Malicious PDF — malware analysis report

Static analysis result for SHA-256 1256ada3da45725b…

MALICIOUS

PDF

43.4 KB Created: 2020-09-10 19:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abb8c383d56c4bb92b790244c11309ec SHA-1: 6e1ddfe26c18ea081f862d78c55b32f0f03caedf SHA-256: 1256ada3da45725b63649b8069e380302055bdd2438e74b8a5f672a20aae07d6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body also contains this URL, suggesting an attempt to trick users into clicking it for a 'guided tour'. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, but the PDF structure and embedded URL strongly suggest a phishing or malware distribution attempt.

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=westminster+abbey+verger+guided+tour
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/0467/7543/files/union_budget_2020_study_iq.pdf
    • https://cdn.shopify.com/s/files/1/0435/3546/6655/files/27807042183.pdf
    • https://cdn.shopify.com/s/files/1/0454/2945/7064/files/social_work_critical_theory_and_practice.pdf
    • https://cdn.shopify.com/s/files/1/0462/1854/3258/files/7709379023.pdf
    • https://cdn.shopify.com/s/files/1/0438/2998/5430/files/ejercicios_someone_anyone_something_anything.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/23103811681.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7916/files/vanilla_wow_item_ids.pdf
    • https://cdn.shopify.com/s/files/1/0434/2435/0375/files/letter_of_intent_template_for_lease.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/xidifituga.pdf
    • https://static.usrfiles.com/ugd/ce14f3_c343f6a8d91144aea14ccaf8b1577c62.pdf
    • https://static.usrfiles.com/ugd/8ac1ab_c33a649c22ae4b0b89a1d8b6fb3c4cfe.pdf
    • https://static.usrfiles.com/ugd/b8c837_f74a5a5cb2074ed6869c334f141b7749.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_815c3dbff2094d24ae1d0641dbbc44a7.pdf
    • https://static.usrfiles.com/ugd/31bf02_44f0cab3aed44ed39bc2190bac481c85.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3924/files/96311605535.pdf
    • https://cdn.shopify.com/s/files/1/0451/3808/3994/files/jetilodinasejamo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/wuwugaxifixawevegopud.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/2057674677.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60527157158.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_off00006b1b.bin
3be6df893b2c548764722b9ee3a4f1d857646f3e4a3af8bf9c624a50f5c23d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1B 5428 bytes
font_01_sfnt_off00007d8d.bin
02f62c19feede83567fdd37dddaafd5f65cc06e419bddbf39a78d7f3da6f172e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8D 10192 bytes

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