Malicious PDF — malware analysis report

Static analysis result for SHA-256 368af9d0610a7eb5…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 19:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd1abb4579334ee8b647055b35bdeacb SHA-1: 49c4de2cba29d76a7137db5f731e6d94eb6a3af9 SHA-256: 368af9d0610a7eb55195a6da711f03475d305b249d1a847218050a328781bd57
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure to download PDF files, with the primary malicious link being a redirector. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=bachelor+pad+house+plans+pdf
    • http://files.gingertomjasonhutton.com/uploads/1/3/2/6/132695915/majululakoti.pdf
    • http://files.b-schoolbuddha.com/uploads/1/3/2/6/132682125/fetalivibafewevojod.pdf
    • http://files.aldaqah.com/uploads/1/3/1/6/131636789/garoga-minupopovu-lilurejemi-lezoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6588/4323/files/automobile_engineering_books_s_chand.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6511/files/rodaxo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/64354061799.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/wakovafajimawot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8078/files/lewebawejuratefivabaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/training_complex_cognitive_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3571/files/71209246827.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negonarufefozosaburesid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7207/7475/files/jemubofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/lumat.pdf
    • https://cdn.shopify.com/s/files/1/0437/8322/5506/files/52449263658.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/state_financial_corporations_act_1951.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1973/files/kekilugevede.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a03.bin
af8652b0be1ab8303be7e5ccf05d2adee13c9bc4f99133bd9c35d6442c945c19
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A03 5292 bytes
font_01_sfnt_off00007bfb.bin
7fdcb41bf14d238da1f94d3f0573d405149e0d9cfd9ea8d05812bc07bd4ada39
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFB 9880 bytes