Malicious PDF — malware analysis report

Static analysis result for SHA-256 90eca88decaa5a18…

MALICIOUS

PDF

47.8 KB Created: 2020-08-31 00:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18b30c54600023bda93a1792199cdd97 SHA-1: 2b3855c8e9c76351ebe34ffd73722f7e55036ca2 SHA-256: 90eca88decaa5a188db398f5d804374771a781ddf89105537701e4f3aee25522
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/wix?keyword=soulager+une+migraine, which is also present in the embedded links. The PDF also features a link farm hosted on Shopify, likely to obscure the true destination or for SEO purposes. No scripts were extracted, limiting the analysis of direct payload delivery.

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/wix?keyword=soulager+une+migraine
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/semigo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1932/7896/files/towaxavevok.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/dafulogidobajed.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8311/files/mibetilufagexadaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/vejopuvagebegizad.pdf
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/acer_predator_helios_300_touchpad_driver.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/febrile_neutropenia_guidelines_2020_idsa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/fomiputilipisunazewebu.pdf
    • https://static.usrfiles.com/ugd/704566_778646562f9f4764a360c23be083b35e.pdf
    • https://static.usrfiles.com/ugd/4c1554_58ee19f2d2b54dfb97d983c89bacd81e.pdf
    • https://static.usrfiles.com/ugd/fef806_a0f2e7f6e6f84639acdfff3ef7bd8d21.pdf
    • https://static.usrfiles.com/ugd/7c3584_93ccc287cec7439895511be4855c5d08.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/81635187322.pdf
    • https://cdn.shopify.com/s/files/1/0450/9886/0707/files/rirukuxokafesaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/anatomy_for_sculpting.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_off00007d16.bin
e8a7167ddf69c81592e5c68489672ac56383b2c83fbb662cdb9f53d469e10c89
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D16 4928 bytes
font_01_sfnt_off00008dba.bin
2fefc4b25ecbf6613ef624158997fe229be02baf474da9a6571cbef66b60af40
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBA 11240 bytes