Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b345e8ee169793a…

MALICIOUS

PDF

36.8 KB Created: 2020-08-30 00:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c44420c07a0879f7ca1a19f9d8f3226 SHA-1: 6a59e49be739a395046de9e01fb2ce31d9ea1c39 SHA-256: 7b345e8ee169793a7d23912b54b2910c25d0c9d99394ae1bb9f0ab0aedfa6fd4
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body also contains numerous links to other PDFs hosted on Shopify and other platforms, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector link strongly indicate a phishing or redirection 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.ru/wix?keyword=pak+all+trailer
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9831/6705/files/student_companion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/83854762653.pdf
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/tefopen.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7261/files/anjaan_tamil_movie_songs_masstamilan.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/la_guerra_sucia_book_questions_and_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_d959ab4ea29e44358bc3c9c5325339e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_4435acaf8f07454098913d9b1539bec5.pdf
    • https://static.usrfiles.com/ugd/b0b521_45abd4daac9d41549655ef77d04bf549.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_93c91b0f1c5247bfbcd9811ee4b81eb4.pdf
    • https://static.usrfiles.com/ugd/6f53d7_e1cfb84d5e34422a9a318f4d6e7a8e4d.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6324/files/63114710578.pdf
    • https://cdn.shopify.com/s/files/1/0461/9121/4743/files/ejercicios_de_composicion_centesimal_3_eso.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_off0000543e.bin
93301984d634db660399a3c118bd642176dea3e826229804327983178b5bee35
pdf-font-stream PDF embedded font (sfnt) at offset 0x543E 4568 bytes
font_01_sfnt_off000063cd.bin
d0ab914ad8eee8457335ad97c24e0eae0744511f7c9d79b3c9766fb279c7d4b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x63CD 10420 bytes