Malicious PDF — malware analysis report

Static analysis result for SHA-256 194e2d8cfcad9474…

MALICIOUS

PDF

43.2 KB Created: 2020-08-23 23:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0dde0285fa49b3c148f99ecd21b17a1 SHA-1: 490fec906d1eb5edff06c4c3d84ffbcbb5317552 SHA-256: 194e2d8cfcad94740a2942e781f5fd7b0d919850b99681e3308ded3b34b25583
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous links to Shopify-hosted PDFs indicates a link farm strategy to improve SEO and potentially distribute malicious content.

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.com/pify?keyword=bpm+program+free
    • http://files.minercountyhistoricalsociety.org/uploads/1/3/1/3/131380467/f313d2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/97845691047.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6241/files/juner.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9263/files/troy_stetina.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/26791802379.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/vibokaxebexuzonov.pdf
    • https://cdn.shopify.com/s/files/1/0444/8750/8135/files/36508773754.pdf
    • https://cdn.shopify.com/s/files/1/0450/1287/7462/files/font_chaparral_pro_light_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4658/files/40159792883.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1177/files/destination_a1.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/59961178831.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000601e.bin
0186a194185ce900264baedaf95ca7d57ad80fa35f60e4aab985f5e7a6738300
pdf-font-stream PDF embedded font (sfnt) at offset 0x601E 4612 bytes
font_01_sfnt_off00006fbf.bin
47e69e77bebd642eb2c291dbd55dfce3203b3eb71edcc9d1f5f377249cc8a38b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 10060 bytes
font_02_sfnt_off00009242.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9242 4324 bytes