Malicious PDF — malware analysis report

Static analysis result for SHA-256 634109b9084b13c9…

MALICIOUS

PDF

37.9 KB Created: 2020-09-03 17:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbf81d1e01e8652a0518c3141230234a SHA-1: 6611c27e0f3f1f93a14bf158f4e5468d489f3b22 SHA-256: 634109b9084b13c918d4e16dfb6cbeb63c1866e7d41775e491cac52b5763ab5e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains. One prominent link directs to a known malicious redirector at `ttraff.club`. The presence of a link farm and a malicious redirector suggests this document is designed to lead users to malicious content, likely for phishing or malware distribution. No scripts were extracted from this sample.

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=dresden+files+storm+front+epub
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/3179/6634/files/zoxafosotasopilixaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/cours_chimie_atomistique_l1.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/96712091787.pdf
    • https://cdn.shopify.com/s/files/1/0436/5844/4958/files/sopike.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/84251901712.pdf
    • https://static.usrfiles.com/ugd/99965f_7881911bd6c94d4a8383bed0c8425acd.pdf
    • https://static.usrfiles.com/ugd/61b8bf_2ae4f9b7097b4899bb28d33b9e839c06.pdf
    • https://static.usrfiles.com/ugd/85d67f_bdf19810d36345abb46b47006a28e542.pdf
    • https://static.usrfiles.com/ugd/b8c837_32d97ab57f0a47c9ab6851cf43d13cac.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/cambridge_igcse_business_studies_coursebook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/disputed_moral_issues_mark_timmons.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/anti_cancer_diet_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/ink_master_full_episodes_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/great_is_thy_faithfulness_g.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_off00004921.bin
c139af70edbc7496247eabe94b169a9dc063d27a91495030ac7b5028ee6ed0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4921 4996 bytes
font_01_sfnt_off000059fb.bin
23a476c0ab708db69b926a7dca9be046219dff283f82ab9e5b6e86df3b7d9671		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FB 10132 bytes
font_02_sfnt_off00007ca1.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA1 4324 bytes

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