Malicious PDF — malware analysis report

Static analysis result for SHA-256 110c09bb2ed09be8…

MALICIOUS

PDF

39.5 KB Created: 2020-08-14 19:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61346cf165ac5c327add198f1fa7947c SHA-1: 6dee249c71bcd87eae78883efc68780cae909c97 SHA-256: 110c09bb2ed09be88860b6a1275402fffb23bc5d1ee98d68cb351ff92377b45c
194 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. The document body and heuristics indicate it's designed as an advance-fee scam, likely attempting to trick users into visiting malicious URLs. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent, possibly involving JavaScript for redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=personal%20space%20camp%20activities%20pdf
    • http://files.blacktriviabooks.com/uploads/1/3/2/6/132695194/9644589.pdf
    • http://files.modernterrain.com/uploads/1/3/1/4/131453944/6f4b3c8565b6736.pdf
    • http://files.2byacht.com/uploads/1/3/1/8/131871553/962640.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8291/4723/files/egypt_pyramids_history_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/vutokodosez.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/50888791667.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/99269578762.pdf
    • https://cdn.shopify.com/s/files/1/0436/5441/4494/files/fairyland_3_activity_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/41021014672.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/practical_english_usage_filetype.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/22621321702.pdf
    • https://cdn.shopify.com/s/files/1/0451/1108/3160/files/rashi_chakra_sharad_upadhye_book_in_marathi.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_off00005cb3.bin
0ee9b32f9fcc79060b0d7f6d7c65fd6c6e9b4866cd95f01306f7ed58d1a175a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB3 5364 bytes
font_01_sfnt_off00006edb.bin
d469e0a4e1b6709afcd92849b431d0ebde2bb2e8b9959588aea5ae1df5a62ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDB 10060 bytes

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