Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c22eced65f364cf…

MALICIOUS

PDF

33.1 KB Created: 2020-08-21 16:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7015ffb3f0231c1cb4f8dfad860b1a61 SHA-1: d6deee81f0938127476546b5a4f9d2b70d8116ac SHA-256: 6c22eced65f364cf4d54e0612b003c81d1c4c5f0f8073ffa6f2449b0fdefb71a
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which, 'https://ttraff.ru/pify?keyword=liquid+bleach+material+safety+data+sheet', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Liquid bleach material safety data sheet' and also includes the malicious URL, suggesting a lure. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to disguise the malicious intent. No scripts were extracted, but the malicious URL and the nature of the document suggest it's intended to lead the user to a malicious site, 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/pify?keyword=liquid+bleach+material+safety+data+sheet
    • http://files.continentquest.com/uploads/1/3/0/7/130738553/3618356.pdf
    • http://files.clemsonelementarypta.com/uploads/1/3/1/4/131454808/vawanoxit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7840/8609/files/articles_on_girl_child_education.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/11237473670.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/joxesokuxapuwufunuta.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/69735702309.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/venizajofokidedajizotevud.pdf
    • https://cdn.shopify.com/s/files/1/0465/1584/7326/files/75790848639.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/supopoxol.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/hadees_book_download_in_urdu.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_off000042da.bin
112d4ddee9470f7d461d09d94cd509fbba8808c5f5e596d9f41a5fc6cb653cdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x42DA 5572 bytes
font_01_sfnt_off000055a4.bin
36d6934a94d5b4eeda94ae52f86a909349045122dd85407b9912755af0a276ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x55A4 9940 bytes