Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6f96e0ab21c0fa…

MALICIOUS

PDF

42.1 KB Created: 2020-08-09 12:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b45b81791f80b24c0b8478cd145738 SHA-1: 1eafafda68999598eb7744894da19dcd2b1a05ab SHA-256: 5e6f96e0ab21c0fabacaac4724a94a79f08119d744ee79e6a8ae87a868c74100
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=ndlea+app+form.+pdf'. This suggests a phishing or scam attempt, likely delivered as a spearphishing attachment. The presence of many Shopify-hosted PDF links indicates a potential SEO link farm used to obscure the malicious destination. No scripts were extracted, but the embedded URLs are sufficient evidence of malicious intent.

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/pify?keyword=ndlea+app+form.+pdf
    • http://files.wileystradingcompany.com/uploads/1/3/2/8/132814196/9673687.pdf
    • http://files.jdmccauley.com/uploads/1/3/1/0/131070367/bumebomevadusotob.pdf
    • http://nekox.missionlivingwaters.com/uploads/1/3/2/3/132303229/nolazumeponuviwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/merge_sort_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/kisaxitevurelolu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0412/5599/files/sokezozagawujok.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/78519960955.pdf
    • https://cdn.shopify.com/s/files/1/0433/6612/1623/files/mind_body_dualism_descartes.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/27802894003.pdf
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/brother_hl-_5250dn.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/vebudokenu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/5603978190.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/xuludotibumezigebamij.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/83294853869.pdf
    • https://cdn.shopify.com/s/files/1/0436/3016/6176/files/rutexegutef.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/bupid.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_off000067b5.bin
1fb4c631c9205baf2542ad7bde18f214d1e1ff9fc7df77c3b8941bcd202fbff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B5 5012 bytes
font_01_sfnt_off000078b5.bin
f983a814d6bbbeb489f63c90836797d427aeee3160f429ba40dc7a784372b100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B5 10264 bytes

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