Malicious PDF — malware analysis report

Static analysis result for SHA-256 1565f9ea1226d68c…

MALICIOUS

PDF

48.2 KB Created: 2020-08-16 22:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b94d88a3cf94d8875fc04a28d525a1e8 SHA-1: be054ea704977c23875d6bd311e53212fc7a8484 SHA-256: 1565f9ea1226d68cbe7fa8f6ea873c0fd125ffd427f5494e492d9e2bc0f4b086
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=avatar+movie+video+songs`. It also exhibits characteristics of a PDF link farm, embedding 17 external PDF links, many of which point to Shopify-hosted files. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of 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.com/pify?keyword=avatar+movie+video+songs
    • http://files.escollins.com/uploads/1/3/0/7/130739251/bekozinixekesasaxake.pdf
    • http://files.amarajk.com/uploads/1/3/2/8/132814611/nuwamojeverow.pdf
    • http://pevinulom.rareearthds.com/uploads/1/3/1/4/131406717/5441998.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/12119206002.pdf
    • https://cdn.shopify.com/s/files/1/0435/6312/2843/files/world_of_warcraft_rpg.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/julebijosiguledezefamexu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/xejexirufiximexeper.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/20586135222.pdf
    • https://cdn.shopify.com/s/files/1/0440/5847/6694/files/the_walking_dead_comic.pdf
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/gizovovuloxajixozoximonu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/bamoloponepamivefivuril.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/fixavifemuwififoluluxida.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/commodore_64_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/43935064512.pdf
    • https://cdn.shopify.com/s/files/1/0446/6117/8521/files/2016_nissan_rogue_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/jurosovibumeniso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34680977850.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_off000067ea.bin
a7735ddd5474b173f906619a52ee7f9e88e9baa366b7cfbe503b380a7557fb87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 5160 bytes
font_01_sfnt_off0000795e.bin
54f24f39a6c66e610c18d73e6c58360aae5ffd3fa2e24a370cb883806bf1df1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795E 7292 bytes
font_02_sfnt_off00008f72.bin
6726a25ca95165a512bae97a4ff823cfcbf4e9fdc0cbcea3b130bcf60ff0acbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F72 10476 bytes

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