Malicious PDF — malware analysis report

Static analysis result for SHA-256 668e70332fc7a9f5…

MALICIOUS

PDF

38.4 KB Created: 2020-08-31 18:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6744a0c9c6b2ef6cc7f26e20bf51a45c SHA-1: b975049700f0a4f1b515743e2a69aec4123e22b3 SHA-256: 668e70332fc7a9f578abebd5b244d0cf319772b97a1f5f91e2b423c8ae113266
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains references to the redirector URL and other Shopify links, reinforcing the link farm attack pattern.

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=koilkuntla+weather+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/janegopowirivevarinujo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/antioxidantes_unam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9975/files/history_of_detective_fiction.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/75467466025.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/22110500931.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0435/5119/5299/files/64516617417.pdf
    • https://cdn.shopify.com/s/files/1/0434/4673/0904/files/kojodizimuxovave.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/login_template_android_xml.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/ponepuledeti.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/6013523069.pdf
    • https://static.usrfiles.com/ugd/5af86b_4ec6fbdd0c7e4b9ca7f2f10dfe8e5f00.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_edfb3e95e19f4fb8a32effbc0b525cc5.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_31dc083352b94f8a9822c5778a1e9da0.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_off00005a78.bin
c362d0c5c2d36a6d058f8f4e1cd327534973faf132f26ee52c4d33b7b97719c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A78 4852 bytes
font_01_sfnt_off00006b00.bin
00b909f3453fe74cdd9468084d70267d058f8c99977fda6d79618e1d95b745ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B00 10028 bytes