Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc972d9207303198…

MALICIOUS

PDF

45.2 KB Created: 2020-11-06 21:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 32878ae33b2429684f866b8dd72cd19f SHA-1: bb4bef3533ab3f2c30e79f1ea5ce8f951fadfbdf SHA-256: dc972d920730319892d0d79e010a6a1a119bf9d28cfc5395c45b86b115fc46f9
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document functions as a link farm, containing numerous embedded URLs that lead to external websites. One of these URLs, https://gettraff.ru/123?keyword=i+ready+hack+coins+using+developer+tools, is identified as malicious redirector infrastructure. The document's structure and the presence of many external links suggest an attempt to drive traffic to potentially harmful sites, possibly for phishing or malware distribution.

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=i+ready+hack+coins+using+developer+tools In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/ddda4f32f8f979.pdfIn PDF document text
    • https://tuvomirunasoz.weebly.com/uploads/1/3/4/3/134324776/8134758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5f9c0a6e84e9f.pdfIn PDF document text
    • https://dajifavetesa.weebly.com/uploads/1/3/4/2/134234726/gibunuvotulejili.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/xodimopulepibu-xagizemudi-bofin.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/7d211d88c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f9104c410356.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/27b0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://maxekodu.files.wordpress.com/2020/11/jebesanuxugobun.pdfIn PDF document text
    • https://jopafez.files.wordpress.com/2020/11/culligan_n8_custom_water_conditioner_manual.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/67728004733.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_off0000718e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x718E 5500 bytes
SHA-256: d24c57669a0b091d65cd505807ccbfc27f740160c205dc1c21c7a09a58558109
font_01_sfnt_off0000844c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844C 10580 bytes
SHA-256: 06122e2761e39e0357a52d2a6049f79e69809bb3b6cc2c596c2f0e8086611578

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