Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab207fd8fe13717…

MALICIOUS

PDF

42.5 KB Created: 2020-08-07 23:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b36f60696999515ea113a2a42bed27e2 SHA-1: e4697df437fb9c9c420ba00a7a992ad2c02d9a03 SHA-256: 6ab207fd8fe13717a4dfcd93d33b7a3eea3926397ba711e83633b93ce143f3dd
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a redirector link to 'ttraff.cc', indicating malicious intent. The presence of a 'download button' lure further supports a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document delivery, likely via spearphishing.

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.
  • 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=how+to+edit+and+save+a+pdf+file+for+free
    • http://files.karigraydesigns.com/uploads/1/3/2/7/132712558/pirexadeb_gojujazo_bezuloxeb_viluvoxaboveb.pdf
    • http://files.blueridgepac.net/uploads/1/3/1/6/131606262/e585dfefd9.pdf
    • http://files.greenvillechoralsociety.com/uploads/1/3/0/9/130969166/8107224.pdf
    • http://files.sinisterkiss.com/uploads/1/3/0/8/130873758/galemu_xevuganuv_gujemexodupiru.pdf
    • http://files.shellybroughtonart.com/uploads/1/3/1/4/131453086/gemuz_kipizog_fasogaluwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/26547879131.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/24459815738.pdf
    • https://cdn.shopify.com/s/files/1/0436/9560/3880/files/tally_direct_expenses_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/3575/4650/files/26029922614.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/18692245194.pdf
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/tufivisaduwimeken.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/20296383590.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/31734148095.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/xosutisun.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1068/files/total_gym_1700.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/aula_internacional_1_nueva_edicion_libro_del_alumno_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/ldc_answer_key_19_august_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/92980795416.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_off00006807.bin
75774eb9bf72bd67dcb763f287487ee69f87d210309558ed96e9261f7c9592e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6807 5148 bytes
font_01_sfnt_off000079af.bin
9762c408cf2c9c4390c4b9d3ce826732083a040cf2e43217bc7f071ce7592a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AF 10304 bytes

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