Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc3929045522fc0…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 08:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 041d40ac895aba39261c0fa728928f4e SHA-1: 68309f729ad759eb65ed6861ef2cafab196fd0c6 SHA-256: 5bc3929045522fc0c46d0499c4d89d06c4de87959391ad5fea9e979919e4dd9e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `ttraff.ru`. The heuristic `PDF_SEO_LINK_FARM` indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly suggest an attempt to redirect the user to malicious content, likely as part of a phishing or scam 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.ru/wix?keyword=reading+comprehensions+for+grade+2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/migoguxomago.pdf
    • https://cdn.shopify.com/s/files/1/0430/9339/3557/files/fagapefevakozuluzenofa.pdf
    • https://cdn.shopify.com/s/files/1/0466/4986/8453/files/46285458330.pdf
    • https://static.usrfiles.com/ugd/b8c837_235f4b208c544ea4a61d2f19902fb17e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e77df26b51f541e8a37de4b2bdf1252c.pdf
    • https://static.usrfiles.com/ugd/b8c837_93fafc71b886419388be7913a72d0731.pdf
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/balkanski_spijun_film_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/defakega.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/zekozebefoviraze.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/85679027255.pdf
    • https://cdn.shopify.com/s/files/1/0429/7805/0201/files/wajifunezefe.pdf
    • https://cdn.shopify.com/s/files/1/0457/7247/2486/files/jusulufipev.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_off00006229.bin
a068c3d0de3c50acb80c6c97bc6161703d908f350309f4d7916825cf0a4adba0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6229 5676 bytes
font_01_sfnt_off00007542.bin
022dbbd69a8383f83a3ca782664a6c89c8c345b9419a7ccec94507d81f888322
pdf-font-stream PDF embedded font (sfnt) at offset 0x7542 9792 bytes