Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bbd1fb7555718b2…

MALICIOUS

PDF

34.9 KB Created: 2020-08-30 15:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e74f3976399d7f44d5e3fa3775c7ffb2 SHA-1: 9477994e3e785eb7992bfae5144d844840f95348 SHA-256: 9bbd1fb7555718b236cafa482445a2972cf877cd029ace67024bc68f3cb825ff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a manual. The link leads to `https://ttraff.cc/wix?keyword=texas+star+dx+350+owners+manual`, which is flagged as malicious. The document body, though heavily obfuscated, contains this URL, indicating the primary intent is to trick the user into navigating to a malicious site. No scripts were extracted, and the PDF structure itself is the vector for the 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/wix?keyword=texas+star+dx+350+owners+manual
    • https://static.usrfiles.com/ugd/b8c837_fae49135642142e999509e05cca976d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd1ec1c84f314526b26d0fd9f920fe46.pdf
    • https://static.usrfiles.com/ugd/fe83c3_c614117126a74588a1a8c609a14e7a1c.pdf
    • https://static.usrfiles.com/ugd/271e65_96db1896ef7745ac8991e52a43e5b06b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d88feceb1d34f07a902010f38dc25c3.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/zoselaverox.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7570/files/vakitofiwibovurizuzi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/tidaluxidukivumuwasetu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/jukesevugased.pdf
    • https://static.usrfiles.com/ugd/8ab72e_59f119b03d934279b4bd276b012b4480.pdf
    • https://static.usrfiles.com/ugd/5e8de6_677b056378a04b9c9c401736c2d457b2.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/sisuporigadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1256/files/scaramouche_jones_script.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/penusudaxuzagowikegetuje.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_off00004892.bin
a50e500c185892948cf9f5443762355aa602ddf2b5edab5920e38134de7a9e59
pdf-font-stream PDF embedded font (sfnt) at offset 0x4892 5508 bytes
font_01_sfnt_off00005b49.bin
6c9972f694f1e946c481b5592701c42aca4d4b0191c799f025740a651fe6f6e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B49 10044 bytes