Malicious PDF — malware analysis report

Static analysis result for SHA-256 2630195967f885ea…

MALICIOUS

PDF

69.9 KB Created: 2020-08-13 09:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e03af55bb1396f9d010ceaadb4420aa7 SHA-1: e6c722e55b1da455dd9801e59b68cc10fb8f9992 SHA-256: 2630195967f885eaeeb9a8adeebb2ccdc83df7b2274a81ffea295e0d7bb3db6a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/wb?keyword=independent%20and%20dependent%20clauses%20practice%20worksheets. While many other links point to benign Shopify domains, the presence of the redirector and the ML classifier's high confidence score strongly suggest malicious intent, likely for phishing or malware distribution.

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.ru/wb?keyword=independent%20and%20dependent%20clauses%20practice%20worksheets
    • http://files.easyyementours.com/uploads/1/3/2/6/132681219/barobemivibifilalez.pdf
    • http://files.hetspul.nl/uploads/1/3/1/3/131378838/3029a58e177a743.pdf
    • http://files.sf-kitchen-remodeling.com/uploads/1/3/0/8/130873715/roxawetew_boponizefikop_vapavet_ritexapaxuwe.pdf
    • http://files.portraitsbyglenda.com/uploads/1/3/0/7/130738593/vipokujog.pdf
    • https://cdn.shopify.com/s/files/1/0437/2352/2216/files/tratamiento_de_alopecia_androgenica.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/88278128916.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wimuwukewamofese.pdf
    • https://cdn.shopify.com/s/files/1/0435/1354/4863/files/epilepsy_causes.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/mental_math_worksheets_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/potipukobixetovikag.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/60222980322.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/58860237631.pdf
    • https://cdn.shopify.com/s/files/1/0431/9500/7137/files/bearing_the_unbearable.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/47581172187.pdf
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/tobivejimunivekanuvegefe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/rinejajixojuxagutipasux.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/88597568140.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc2c.bin
9e930a7addac52418864887927ca661210cf52205186850714eea3b38f618a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2C 2828 bytes
font_01_sfnt_off0000d627.bin
5fe769d0cabda1174480a8d2c0a7a41c656fcd32b264ad94e9f0e53e4cf361dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD627 5256 bytes
font_02_sfnt_off0000e800.bin
385b1c0fa4bee7354991734f18f68fc007ec2b86af41b78c4e394c4882e0c3ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE800 9932 bytes

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