Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04451921326a002…

MALICIOUS

PDF

44.2 KB Created: 2020-08-29 22:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2388790b1ce826bc59e2e323be35a6e SHA-1: 667bfbe2fb1893d79d4b5f90d7540e6ec6c2a671 SHA-256: f04451921326a0024af52a3dd07feec7b507855cebb726a7f513948d6c2ea240
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The embedded links suggest an attempt to lure the user to external malicious content, likely for phishing or malware 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=extracurricular+activities+chester+g
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/poluwemojid.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/mtg_complete_neet_guide_biology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/30445960937.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f7deda28ff6422481ffdd6e65b38894.pdf
    • https://static.usrfiles.com/ugd/4c1554_671ffc96d03d4d70bfbe363166b3177f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3fad402974c48eda4ff995286b5a2a6.pdf
    • https://cdn.shopify.com/s/files/1/0437/5347/2151/files/laxufomojixupok.pdf
    • https://cdn.shopify.com/s/files/1/0433/4659/1903/files/askep_fistula_perianal.pdf
    • https://cdn.shopify.com/s/files/1/0436/4615/6960/files/bejomonobopemavuromogaxem.pdf
    • https://cdn.shopify.com/s/files/1/0437/5432/4117/files/49463236994.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/53444044908.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/85011233818.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_off00006fbf.bin
a8d2674e4e6382598f9a5989888528fa4730aff30776036836fa5197ce4cbd18
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 5144 bytes
font_01_sfnt_off0000813d.bin
7ed4fd111de31bc5b37117206be7339cd86723bace83a478819a52354bfac325
pdf-font-stream PDF embedded font (sfnt) at offset 0x813D 10164 bytes