Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddb72e7faab81d8…

MALICIOUS

PDF

40.4 KB Created: 2020-10-16 10:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4f2a0127faac65d188546d99d4cfe22f SHA-1: fd6a0921eb79a0b04352363f907e74e2f04bfb2a SHA-256: 2ddb72e7faab81d84f0a55d9036ba64315afedfa8d03df8e3b277c37ee23e2af
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to redirector infrastructure or other PDFs, suggesting a link farm or SEO poisoning attempt. One prominent link, 'https://gettraff.ru/123?keyword=computer+operator+jobs+mcqs+with+answers+pdf', is flagged as malicious. The document's structure and the presence of numerous external links indicate an attempt to drive traffic to malicious or deceptive websites, likely for malware distribution or phishing.

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://gettraff.ru/123?keyword=computer+operator+jobs+mcqs+with+answers+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f8899098c258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f8889cedd20b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f877adbc5992.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/goteki.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/tafojarike.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://fifowekuvepu.weebly.com/uploads/1/3/0/7/130776735/1725566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f892b3cc056a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f871353e4456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f88b222a6a3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f877ced35b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f874d0bc44fa.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/1/0496/5960/9245/files/siap_padamu_negeri_pkg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/13775118957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2569b3bd-7b3c-4901-93e3-a0db9fdaac2d/38236706461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b953b10-48d3-4b74-9f6d-23c9e2143ae3/13752206381.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_off00005c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C54 5704 bytes
SHA-256: 0be68680e098f938956bc3f4814c9571d7bd83be922ebdce848e12c5087e8dfc
font_01_sfnt_off00006fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA5 11228 bytes
SHA-256: 2854d96c3d1ec514300770d90a7718cc7a385e0b9066fc92008a59be03b20b51

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