Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e0483f78002720…

MALICIOUS

PDF

47.7 KB Created: 2020-08-16 20:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17a2b16e0e17ee444ee3433b86276bb4 SHA-1: d68588dd0ac430e01108c48683c36292d92aced2 SHA-256: 66e0483f7800272056c6a7f7996e9b2ebbc52f17eec02d49ced2cd3a4c067fc6
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=appraisal+form+1004p, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external content. The presence of numerous Shopify-hosted PDF links, while some are benign, indicates a potential SEO link farm strategy to obscure the malicious redirector. No scripts were extracted, but the PDF structure and malicious URL strongly suggest 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/pify?keyword=appraisal+form+1004p
    • http://pogup.swisscompleteeyecare.com/uploads/1/3/1/4/131407558/1631429.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/98093587675.pdf
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/carpet_sweeper_reviews_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9422/files/67572915065.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/83687460100.pdf
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/70698468203.pdf
    • https://cdn.shopify.com/s/files/1/0433/6409/0006/files/jezefuxupevijazekefipokas.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/zonafefuvov.pdf
    • https://cdn.shopify.com/s/files/1/0436/7056/9113/files/ragaxulabiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/0357/4432/files/12516270520.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/wopovemobagezaj.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_off00007e1f.bin
3d9ecadb8e8d36f06187db396e5593884f52503b40c78cb392e497afc77a8306
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1F 5320 bytes
font_01_sfnt_off0000901c.bin
4fa8c8a8139f4728a76f410d82ba3b008dcbd29da23200f82c71a90b20bef3b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x901C 10088 bytes