Malicious PDF — malware analysis report

Static analysis result for SHA-256 6682726eed7efbcc…

MALICIOUS

PDF

47.6 KB Created: 2020-08-02 17:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab42351dc586210b6459bb82b8aac96e SHA-1: 7008845e3e3eb3ead5f533c56e4c3aff162a967c SHA-256: 6682726eed7efbcc8f1450ae21b42e0d01acf0ef1491ae1c53c1b49d637b5734
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary malicious redirector being https://ttraff.ru/pify?keyword=starbucks+barista+espresso+machine. This heuristic firing indicates the document is part of a link farm, likely for SEO manipulation or to distribute malware. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=starbucks+barista+espresso+machine
    • http://files.fjsac.org/uploads/1/3/1/8/131872070/wadisadezelurire.pdf
    • http://files.rachaelkoolcounseling.com/uploads/1/3/0/7/130775970/8735725.pdf
    • http://files.tucsonmetaphysicsfair.com/uploads/1/3/1/4/131414743/1608220.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80789229335.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/91411942519.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/49217554640.pdf
    • https://cdn.shopify.com/s/files/1/0430/3690/1527/files/33092583535.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/24170183220.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/64884066956.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6253/files/sidawogopeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/betedosopinadipisufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/48946213111.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4143/files/mobagotojuvetijalopati.pdf
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/rirosagimuwetedizo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4493/6599/files/69714557576.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e6f.bin
6fe85e04bb4c9580748f878abdecc9df2425e1f068f7eb44b5d3a006021215d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6F 5332 bytes
font_01_sfnt_off00008057.bin
08064594b62a72003d98642e1f73bf7fc6e3e97c6f6e03244ab987673c2ebe52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8057 10152 bytes
font_02_sfnt_off0000a2fa.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FA 4324 bytes

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