Malicious PDF — malware analysis report

Static analysis result for SHA-256 341918e519551c18…

MALICIOUS

PDF

36.2 KB Created: 2020-08-19 00:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c786b927c4f8c4cacaa93e7e99697bf5 SHA-1: 8bd40dd40a270901a2b2d9a1506fd4bbbb2567fd SHA-256: 341918e519551c1810ff4c8ce3f3deaac41c8de942f6498bb76ad3af422d2aa8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One prominent link, 'https://ttraff.cc/pify?keyword=fisheries+and+aquaculture+books+pdf', is identified as a malicious redirector. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the presence of a malicious redirector and numerous links strongly suggests a malicious intent.

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=fisheries+and+aquaculture+books+pdf
    • http://files.reallycassandraradio.com/uploads/1/3/1/6/131607158/nasun.pdf
    • http://files.rivervalleyclinicpc.com/uploads/1/3/1/6/131606733/sawub_noveto_modiwarisinulil_zaletinusaworu.pdf
    • http://files.1micmusic.net/uploads/1/3/0/8/130813837/641806.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/xitunaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/zeximegalexezunef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0985/files/pdf_omzetten_naar_word_macbook_air.pdf
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/wabekikixir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9986/5756/files/44258966204.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2246/files/causes_and_consequences_of_flood.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/wererat_dnd_5e.pdf
    • https://cdn.shopify.com/s/files/1/0439/7685/1614/files/captain_marvel_comic_1.pdf
    • https://cdn.shopify.com/s/files/1/0444/0568/6438/files/livro_anlise_combinatria_e_probabilidade.pdf
    • https://cdn.shopify.com/s/files/1/0430/3277/2757/files/29893530042.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/86721385482.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3026/files/33869005266.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_off00004fad.bin
e126979e1ea59e6c663fd6ddd94a1d9eb5c63854959faf78998c997bbf3d266e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAD 5528 bytes
font_01_sfnt_off0000625e.bin
2d5343fbc4f284e6361e9e3661900c79019f4999aed6f1b44c17436e9ad8684e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 9844 bytes

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