Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcb21a9f50593a9…

MALICIOUS

PDF

41.2 KB Created: 2020-08-02 13:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 037b63715a6fac5ce9ea682c2decd305 SHA-1: e655e836d74e1da95d8df873164894b2a6b99574 SHA-256: 6bcb21a9f50593a9a6382dbe84912c4e47250c3598707db17e8e6670559f094d
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious redirectors or host further PDF files. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/pify?keyword=mp3+rocket+older+versions as malicious. The presence of numerous links suggests an attempt to drive traffic to various sites, potentially for phishing or malware distribution, aligning with a spearphishing attachment tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.cc/pify?keyword=mp3+rocket+older+versions In PDF document text
    • http://files.sewoldsewnew.com/uploads/1/3/1/3/131380971/a3c6f1a923addd9.pdfIn PDF document text
    • http://files.caterpillarspirit.com/uploads/1/3/1/4/131437225/f401ed9e36ef.pdfIn PDF document text
    • http://files.bullbearkidsbooks.com/uploads/1/3/2/6/132681404/medewesiposade.pdfIn PDF document text
    • http://files.breastroanoke.org/uploads/1/3/0/7/130739779/1f57c073a.pdfIn PDF document text
    • http://files.beachcitydoula.com/uploads/1/3/0/7/130776402/7727514.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/fusujubedip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2528/5798/files/30599222590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/type_casting_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2535/7210/files/ubuntu_enable_ssh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/sovuxamupakadeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/65813483792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4442/2310/files/jiram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/44014106851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kijajakunij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2511/1972/files/wunijudoxepipujemugudid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/xegabamonekadenokamun.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_off00006321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6321 5148 bytes
SHA-256: 3d5910ab63d3ecd675dff961a06b2a2b0b09179313d1ad8dee91ef8ce5b29dbd
font_01_sfnt_off000074cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CC 10324 bytes
SHA-256: a21ed9d4f0448ba25d1f30f362551642924832bb503b3b1470ca3dea62a07399

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