Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8aa47100b8e4bb…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 20:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b560e015b1d9f28a9d1d28c4d3b9a82d SHA-1: 3cd07a3e8af48a533c2b1502e42c179907b8056c SHA-256: 6d8aa47100b8e4bbaa0789e52ca619fc43aea5bf536cde5901e8f16b577115a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDF files, which is indicative of a link farm. One of the primary links, 'https://ttraff.com/pify?keyword=areas+de+asociacion+cerebral+pdf', is flagged as a known malicious redirector. This suggests the document is designed to lure users into clicking these links, potentially leading them to malicious content or further infection vectors.

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.com/pify?keyword=areas+de+asociacion+cerebral+pdf
    • http://files.doodadsandfandangles.com/uploads/1/3/2/6/132680901/ronifawodizod_setupuvosukuf_wewofokodefeju.pdf
    • http://files.melanieveazey.com/uploads/1/3/0/8/130873958/xilakes.pdf
    • http://files.twinlakecottages.com/uploads/1/3/1/3/131384575/1927038.pdf
    • http://files.uncommonpracticesweboffice.com/uploads/1/3/1/4/131453917/280b1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6036/2392/files/65879470383.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5479/files/80127244336.pdf
    • https://cdn.shopify.com/s/files/1/0437/9456/3221/files/9445614234.pdf
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/free_basic_english_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/3501317156.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/mokowexu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/xubexuker.pdf
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/7024700035.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/muzomefod.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/duxivabusutimavubop.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/subaru_ej25_engine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/molunexemutimumibivifo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5670/0319/files/statistical_methods_in_educational_research.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_off0000677c.bin
9b306dbddf5f082a0700381e2cdfcb0f618b10119b9cc5d1560f60614d1d330a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677C 5276 bytes
font_01_sfnt_off00007973.bin
ab1f6c6ae8f9a8d3526343bc63d51ea60b94a2d7d5cb25f0889e84b12ed82692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7973 12496 bytes

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