Malicious PDF — malware analysis report

Static analysis result for SHA-256 174247d1acdeddce…

MALICIOUS

PDF

50.3 KB Created: 2020-08-05 05:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e7a434d4ff4891052fbd06e1e533d9e SHA-1: 8bef142f496fb6284ce88505995e9b71f47aaadc SHA-256: 174247d1acdeddce4c328015f32cf446aa2d63b8c9e00795612e2e73db311bb2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=basic+sql+queries+interview+questions+and+answers+for+freshers+pdf'. The document also exhibits characteristics of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

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.com/pify?keyword=basic+sql+queries+interview+questions+and+answers+for+freshers+pdf
    • http://files.swsection.org/uploads/1/3/2/8/132814355/961000.pdf
    • http://files.verdancecreations.com/uploads/1/3/1/6/131607522/tewovudinubelepugi.pdf
    • http://files.littlewisheshire.co.uk/uploads/1/3/0/7/130740130/tonumiz-nexixal-pusugile.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/86245993668.pdf
    • https://cdn.shopify.com/s/files/1/0451/1108/3160/files/november_rain_lyrics_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0440/1309/3029/files/barron_s_sat_math_level_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/venebitoviluvenuzipigide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/vefuvez.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/gmat_algebra_questions.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/98573899337.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/18779242144.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/3048600168.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3614/files/wimafapex.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/jowopam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/xifixuvavesomu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0429/5321/2057/files/91865162074.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/nexoludutedagaz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d5b.bin
b4d0b6dcc6578e4cdb526323310912980ebde7a98b0f97665fb649186e9aa4f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5B 5572 bytes
font_01_sfnt_off00009064.bin
710c2500874a04bd7b2233bea5bca0535e28c481c7a322af51255fdd8d699257		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9064 13452 bytes

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