Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe1f20f85d6d58e…

MALICIOUS

PDF

42.1 KB Created: 2020-09-17 01:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cbcac176d229fe177708b8d0461af5d SHA-1: c5d7fd2a93cf2f3168bdb804dadae69d809752d7 SHA-256: 0fe1f20f85d6d58ecf8305ee570b85be898eee9934b12403c119537c574128dd
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 other PDFs, suggesting a link farm for SEO manipulation. One prominent link directs to a malicious redirector at 'ttraff.club', which is likely used to obscure the final malicious destination. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection campaign.

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.club/wix?keyword=zero+sugar+cookbook+reviews
    • http://files.footprintsandrainbows.com.au/uploads/1/3/0/8/130873945/7af74420ff1d0.pdf
    • http://ziwusage.ajconsultingcompany.com/uploads/1/3/1/4/131437792/tabibige_fabupotibe_javasawo_vaxajanej.pdf
    • http://wonapuwef.behindthebenchbunch.com/uploads/1/3/1/3/131379116/3130387.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/tepokutamagafoxed.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/29057211786.pdf
    • https://cdn.shopify.com/s/files/1/0483/9682/8832/files/daily_grammar_practice_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/wukubomavemex.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7992/files/taiwan_mrt_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdf
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/41609326033.pdf
    • https://cdn.shopify.com/s/files/1/0484/8192/7318/files/wizard_tiller_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0754/9338/files/witorenizapefoda.pdf
    • https://37712f3e-beb2-409c-b7ab-1472119b5cc0.filesusr.com/ugd/405339_054337ab001f47ef86f7ec15747df571.pdf?index=true
    • https://af35f4ab-0e41-4100-88d5-10c8c4714000.filesusr.com/ugd/6cf0f5_389f2af144bc4824b7b5285f287c9306.pdf?index=true
    • https://ba53fb1f-2d69-4eac-a0a8-bf1a152bf1b8.filesusr.com/ugd/04c368_9a6eab8350a7458bac454e9da663c44a.pdf?index=true
    • https://2f501b19-c78b-4fc1-8591-cc18b1b45c16.filesusr.com/ugd/fe83c3_5990d0e8935a4dc0aa554224d45e4fa1.pdf?index=true
    • https://7a169ce4-8b26-4877-a3e4-fe0ad6b89a6b.filesusr.com/ugd/681527_a1231138f9cc40e1af3804c7800e4f06.pdf?index=true
    • 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_off000064e8.bin
1596b511f5ebeb28ae6c7a51083bdecae211b46f716ae70d4b50f5cb7ff691de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E8 5248 bytes
font_01_sfnt_off000076f2.bin
2f770cab378e2d2a0fc47bd14b9da7143ed8437dd70d599fbcedb6c82fafab9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F2 10952 bytes

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