Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b31de34f1c0a3a…

MALICIOUS

PDF

89.1 KB Created: 2020-08-14 09:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c9973affb88694489c51855b895365d SHA-1: 2e7f32fb522d885e3afc058891a1e4602a055a16 SHA-256: 68b31de34f1c0a3a305b1f2ed48ea96a403991083ef6e52163b109b21fa38b0d
202 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a redirector link to 'ttraff.cc' and a high-confidence ML classification. The document body, though heavily obfuscated, contains the same URL found in the heuristics, suggesting it's a lure. The presence of numerous PDF links, many pointing to benign Shopify URLs, suggests a link farm tactic, potentially to obscure the malicious redirector. The overall shape of the document aligns with an advance-fee scam.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=django+jinja+template+tags
    • http://finoge.threadsandtreads.store/uploads/1/3/2/7/132712207/5241897.pdf
    • http://files.hellewoodworks.com/uploads/1/3/1/3/131384573/sapamexowajug-tabiluzut.pdf
    • http://kosabal.gabrielececconi.com/uploads/1/3/1/3/131381489/xiledazavipi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/kibunakozeparawekotigaje.pdf
    • https://cdn.shopify.com/s/files/1/0430/7343/7847/files/vedewasodowidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/google_hangouts_easter_eggs.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6758/files/55905904528.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/el_arte_de_la_prudencia_baltasar_gracin_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/35035216096.pdf
    • https://cdn.shopify.com/s/files/1/0432/2476/0484/files/arms_workout.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/zozuvonevuxisaze.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/71186127986.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/nizatadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/11474008047.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_off000111d1.bin
6cb15a072ff70bcc6b833974fca7a640ec553b2addbbc0574d15d3421293a810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111D1 5116 bytes
font_01_sfnt_off00012335.bin
c526463785d388eefce37728df3031f535858458baa6cb070af60ec67ca7b9b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12335 16020 bytes

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