Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd6fe76c26c3fc0…

MALICIOUS

PDF

45.5 KB Created: 2020-08-14 03:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9053c58b5b5b59ea1f3948f2578b62f1 SHA-1: d7e6c555ebd73e8598241d77fe82eabea097a8e1 SHA-256: 5fd6fe76c26c3fc036b67f89fb79d67e89858f8e0a5191f02f6fdc377f22736a
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to trick users into financial fraud. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm used to distribute malicious content or engage in SEO manipulation for phishing.

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.cc/pify?keyword=tennis+bleacher+report+djokovic
    • http://vixev.saidbysydney.com/uploads/1/3/0/8/130814674/volufilev-pepimafovuxa.pdf
    • http://files.alexstudio.bg/uploads/1/3/1/1/131164448/875fbb5e4c12d5.pdf
    • http://files.charlotteaustwickgolf.co.uk/uploads/1/3/0/8/130813528/bepamim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/2347/9462/files/3th_grade_math_word_problems_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/nugujesisixulobulebivori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/81639675877.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/10110197336.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/53143531970.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/37198097568.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0039/files/waste_to_energy_books.pdf
    • https://cdn.shopify.com/s/files/1/0440/8187/3048/files/xegupuko.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/peniwarun.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_off000073d5.bin
3c25ce9b12944c442a6411db226db6dc5cfccc3341ac7d86f4e92257545e94a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D5 5452 bytes
font_01_sfnt_off00008649.bin
39723a0ac0bb68a27ecd5cf0a05fd7ac7e7168e75f7b04c805fdd4f78aec50d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8649 10180 bytes

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