Malicious PDF — malware analysis report

Static analysis result for SHA-256 75457fd63922703c…

MALICIOUS

PDF

38.3 KB Created: 2020-08-23 16:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 035c868cb7275dc7ca7a2b77d7c367aa SHA-1: edf4768e5cb3f0a8daf4dd323de16e405bd6a105 SHA-256: 75457fd63922703c9cf28c88d9435daff059e15226a39ee480068f7dfc41996e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=pdf+file+reducer+soda'. It also exhibits a PDF link farm heuristic, indicating a large number of external links, many of which are hosted on Shopify but some point to unknown domains. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a lure to download or view content hosted on malicious sites.

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=pdf+file+reducer+soda
    • http://files.cfdparamedic.com/uploads/1/3/2/7/132740595/nituwuzo-marinu-bedunor-jesujawikixine.pdf
    • http://files.nannypalooza.com/uploads/1/3/1/4/131437535/bunelekogosiz_zoredegalu.pdf
    • http://bumibezo.nejcrwc.com/uploads/1/3/0/7/130739235/kamikifo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/60098401557.pdf
    • https://cdn.shopify.com/s/files/1/0449/2584/5659/files/ryobi_miter_saw_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7057/7045/files/35009239285.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/49925255449.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/kipaxanuduvojawa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/56876201685.pdf
    • https://cdn.shopify.com/s/files/1/0445/3587/3700/files/bmi_index_table.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/90253033525.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
b7e53a00cff891975a70e7996820b6d6cf249ba0b61f7c071709629f3cc6c86f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A78 5016 bytes
font_01_sfnt_off00006b86.bin
0d0fbf9d08a568d20cb281d10197a872c509e3012d59be1e7fcc391478bf203b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B86 9840 bytes