Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7d36c1393b8876…

MALICIOUS

PDF

45.2 KB Created: 2020-10-15 07:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a62533422b357a269c525e2cf54f085d SHA-1: 59ddc0ad5bd72dc3ee6fb779fe7777b44921fb79 SHA-256: 3d7d36c1393b88760ccb998baa0911ae3b2a98f1ebccbb26b3d54ce7ce100dd9
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirector infrastructure, indicating a link farm or SEO spam campaign. One URL, 'https://gettraff.ru/123?keyword=lowrance+hook+4x+chirp+user+manual', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to disguise malicious activity as a user manual. No scripts were extracted, but the overall structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful sites.

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://gettraff.ru/123?keyword=lowrance+hook+4x+chirp+user+manual In PDF document text
    • https://vurofagulomefu.weebly.com/uploads/1/3/1/4/131452840/zovadev.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/koxaviwuw_vowepotoba_petegerepoxos.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/jaridezasila-vuxomar-botasejafonovug.pdfIn PDF document text
    • https://site-1039886.mozfiles.com/files/1039886/zedumorep.pdfIn PDF document text
    • https://site-1043475.mozfiles.com/files/1043475/zojof.pdfIn PDF document text
    • https://site-1042266.mozfiles.com/files/1042266/woteganokoli.pdfIn PDF document text
    • https://site-1040145.mozfiles.com/files/1040145/30055823240.pdfIn PDF document text
    • https://site-1036972.mozfiles.com/files/1036972/39834869854.pdfIn PDF document text
    • https://site-1038499.mozfiles.com/files/1038499/rorodiwonixirapowo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2066e536-a987-45e8-8be4-b4247be5da82/99265355863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94bdb90-6967-48aa-b8ea-2e4b7ba8b05a/27826279572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1803abda-4479-4fd3-8e82-06959aeb2777/60394265583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae1914e-dafb-4e75-9e8e-86e8803b5361/jekapivok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c99afe25-1d60-48dd-957e-e03f6df2ba7e/20125860067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0beee9-98da-4912-98cf-3ec5cf31f1d1/43579079339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/79382696794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/77782367795.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9A 5428 bytes
SHA-256: 39e4f46454260aa65e30305c849eb880855b76100f9140e53db4e6f0656423da
font_01_sfnt_off000081f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F8 10596 bytes
SHA-256: bc1fd3f8ff2210619f3dc1f81197a8c0ae1712957fdd36f8cb3f14fed10d4c38

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