Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e94a96e36d86fb2…

MALICIOUS

PDF

42.6 KB Created: 2020-08-19 11:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5104df5b1f9dc3c9f5775c1c0334fb09 SHA-1: d9eae09d6e6dd4ef63918b60969b57b1e0ab9707 SHA-256: 0e94a96e36d86fb26b5a8d9817e7da94d8e695825c1265d6432a9873532256d8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=self+adhesive+vinyl+sheets+home+depot`. The document body, though heavily obfuscated, contains this URL and other Shopify links, indicating the primary purpose is to redirect users to potentially malicious content. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggests a phishing or redirection attack.

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.cc/pify?keyword=self+adhesive+vinyl+sheets+home+depot
    • http://files.fredkaplanbiographer.com/uploads/1/3/1/3/131380107/8174254.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0732/6882/files/gerolegudedotunene.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3151/files/46605749433.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/28997873670.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/dekijeriwexes.pdf
    • https://cdn.shopify.com/s/files/1/0447/3529/9738/files/87821432947.pdf
    • https://cdn.shopify.com/s/files/1/0438/6632/5157/files/42671371576.pdf
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/90046650619.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5264/files/puwifuris.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5527/files/25404861960.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/pisimuvekaxasefugadog.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_off00006335.bin
1c12699bc08fdc4ef231c2ea74e786f881e812d04528ebeb54ac1a6d1ec9167f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6335 5452 bytes
font_01_sfnt_off0000759e.bin
9c4c053648993cf409955b195a5b05f11ba8935a2e3d0649cf5aae9205b0512e
pdf-font-stream PDF embedded font (sfnt) at offset 0x759E 12528 bytes