Malicious PDF — malware analysis report

Static analysis result for SHA-256 4367a6907028197d…

MALICIOUS

PDF

40.0 KB Created: 2020-08-31 02:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a3f26999744ea188c28666572ba4a52 SHA-1: f8a9736ca2aa461cc84eda757a184f2a93cf0b32 SHA-256: 4367a6907028197d30ad30932f1248f746d42a25198ea6f3892a137691dc833a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=silhouette+cameo+printer+driver'. The document body, though heavily obfuscated, contains text related to 'Silhouette cameo printer driver', suggesting a lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify and static.usrfiles.com domains, likely to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/wix?keyword=silhouette+cameo+printer+driver
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/script_vs_program.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/nebogexibikekuzejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/rajukuwedidotisavuvisexo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/jidedijowusixipu.pdf
    • https://static.usrfiles.com/ugd/067ecb_93ad3326f11344ef85f829b3337fc7d2.pdf
    • https://static.usrfiles.com/ugd/fef806_25f9648bab38416b9a5d43228af46dfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcc0cc1e0227497490770403dbc9ede9.pdf
    • https://static.usrfiles.com/ugd/0adedf_98eafe194c734623b9b5091b4447b42a.pdf
    • https://static.usrfiles.com/ugd/c0b427_ebe14bca2e5747698cbd94ffcd0e62de.pdf
    • https://static.usrfiles.com/ugd/63d3ad_cf8070bf0b3a4c6cbddd20178a535c8e.pdf
    • https://static.usrfiles.com/ugd/de60da_faf336b9b416406f87d009469d65786f.pdf
    • https://static.usrfiles.com/ugd/a31856_c19e4ed1e99b4b4e924b724200840509.pdf
    • https://static.usrfiles.com/ugd/55cc32_febc75581875435e9cebbbf01d9fa4bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_527e1dd520674f53a0cf9c4579a140c3.pdf
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/20333739586.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/31092484350.pdf
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/silence_shusaku_endo_audiobook.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/61628447022.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/52699062034.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d65.bin
2964517a09287dbcaf424ef2861ddb7644f817335dd3affd22e36851bbc4f308
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D65 5296 bytes
font_01_sfnt_off00006f3f.bin
f1d7fced24ee099c81769ff1b2cec824f3a5ac570e726f46c2c703f5feffe079
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3F 10596 bytes