Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e65a8c65c15515…

MALICIOUS

PDF

39.6 KB Created: 2020-08-26 22:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8923d6cb6bcbc1cfc775e1c92902f82e SHA-1: fbeb9909238148eaff15bb9cb6abf39520bffe02 SHA-256: 81e65a8c65c15515a667689df328f91dc394fd1082e70fb45f7c8c70087cfe89
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=the+lion+king+part+1+hindi+dubbed', is flagged as a malicious redirector. The document body also contains obfuscated text and a reference to this URL, suggesting a phishing or redirection attempt. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm for SEO manipulation or further redirection.

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/pify?keyword=the+lion+king+part+1+hindi+dubbed
    • http://files.oshkoshconcreteinc.com/uploads/1/3/1/1/131164351/rasizir.pdf
    • http://files.evangelcommunitychurch.org/uploads/1/3/0/8/130874437/vomopuvuwo.pdf
    • http://files.coachharris7.com/uploads/1/3/1/3/131382680/5856621.pdf
    • http://files.ccceinc.org/uploads/1/3/1/6/131606630/ruwifadedosojexuxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/mapa_geografico_de_bolivia.pdf
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/vebiropemekezenevetaso.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/92424105848.pdf
    • https://cdn.shopify.com/s/files/1/0437/8253/7365/files/4398715053.pdf
    • https://cdn.shopify.com/s/files/1/0444/8750/8135/files/the_anatomy_of_revolution_download.pdf
    • https://cdn.shopify.com/s/files/1/0462/6903/8749/files/gcse_biology_paper_1_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2335/1458/files/similegaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/pejutufus.pdf
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/33721780444.pdf
    • https://cdn.shopify.com/s/files/1/0439/1629/6360/files/7134139886.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_off00005d80.bin
be29c819f20e9eeaaafa01ac7876700c30b5d5d4fe68adaf39aad66fd8a7415a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D80 5248 bytes
font_01_sfnt_off00006f4e.bin
06c249b4e15b73e8c3c3fe26f4e3edf10fd4702314a46f783958688260bafa93
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4E 10076 bytes