Malicious PDF — malware analysis report

Static analysis result for SHA-256 327435e9440a27d5…

MALICIOUS

PDF

50.8 KB Created: 2020-10-16 06:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 38a380f93d0c26368b0b4bdfec779495 SHA-1: 111576cebb55f63ba2ab1b343d0844e5a9d2dc25 SHA-256: 327435e9440a27d5ebd40a3910a3edf8ca4c95cbb1a2440b6fe9451c64b5f01a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links pointing to external websites, many of which are hosted on disposable domains or known malicious redirectors. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to 'ggtraff.ru', indicating a redirection to malicious infrastructure. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/123?keyword=1984+newspeak+appendix+pdf In PDF document text
    • https://site-1039783.mozfiles.com/files/1039783/bimunizotaligumegimamejo.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/rolerawaxitanemebowaba.pdfIn PDF document text
    • https://site-1048515.mozfiles.com/files/1048515/electromagnetic_spectrum_worksheet_chemistry_honors_answers.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/167c2dd9799fd8.pdfIn PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/4686902.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/c14d9a81686a04.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/43186013072.pdfIn PDF document text
    • https://site-1041381.mozfiles.com/files/1041381/48679074841.pdfIn PDF document text
    • https://site-1040224.mozfiles.com/files/1040224/41745710334.pdfIn PDF document text
    • https://site-1039199.mozfiles.com/files/1039199/62360407837.pdfIn PDF document text
    • https://site-1043837.mozfiles.com/files/1043837/29339414408.pdfIn PDF document text
    • https://site-1043770.mozfiles.com/files/1043770/wabepusilepetekobo.pdfIn PDF document text
    • https://site-1041082.mozfiles.com/files/1041082/somitola.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2c9ec1f6-1754-479b-8ad3-1060b96d9b8b/woxusedujupewunojapaxev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6cceec-8c03-4899-b031-c23d8139a27e/53795897771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/299f1df3-409d-402f-b9ae-a2d0bcf96981/welawerasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442b8718-9e09-4241-aa96-e7441ddc9542/kuriv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff23a60-55f7-40e7-89a0-83fd7092f8fd/50285353884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc7b86e0-306c-48a4-a4f4-c5fcd02ada69/88851292749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65320ac3-e54b-4222-9097-efeda5d77c8d/8853971866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2efd3488-f5a3-4250-85c1-1616ff396667/85697604213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a5d500-aed6-4f7e-ad05-053408ce1513/mipovepomewanofewipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e1f1f3-3aa3-4def-aae8-3e6b29cc77e1/ruseperozalogevexerafeb.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F2 5124 bytes
SHA-256: f6b580d7fa46a2220186040bd81d4563f6f2749fe7d242c8e9a9c46acecbcf49
font_01_sfnt_off00008a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7A 10404 bytes
SHA-256: 993dd1d6b7ee36aceb69a3f6737ba5c23d4af0108bd9846908f752df5db55f3b
font_02_sfnt_off0000ae0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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