Malicious PDF — malware analysis report

Static analysis result for SHA-256 65984733fadc28c1…

MALICIOUS

PDF

33.8 KB Created: 2020-08-30 02:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7614b9135557aa5f06ee26e79240267f SHA-1: 69e18c4b0d6ff7ec99fc74f2ed8d7b4c5ac772ad SHA-256: 65984733fadc28c196009b6ef1bf066ce487227d2ed7e56c6f605e888faea821
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. The primary malicious URL identified is a redirector, likely used to obscure the final destination. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing its purpose.

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.ru/wix?keyword=wingstop+nutrition+facts+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0667/9447/files/85939328733.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xiwisabimetabif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7975/files/35580829521.pdf
    • https://cdn.shopify.com/s/files/1/0436/9265/4745/files/archives_accession_register.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aecc89c16794de0bd20c4facf33b5aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_e779b13cfdce488bb4cb7acf164f97d5.pdf
    • https://static.usrfiles.com/ugd/81d6a4_6e171e2835904ceebd6e05fce14f89c6.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_1534aa929c5844fb921965ac71e781fb.pdf
    • https://static.usrfiles.com/ugd/8cbfce_a5a86da0794b4601893567a33588a125.pdf
    • https://static.usrfiles.com/ugd/4b7290_f1aacdc08817471593ceeed41fc44dda.pdf
    • https://static.usrfiles.com/ugd/b8c837_151d0201c8e44307b452a5ebf81ff981.pdf
    • https://static.usrfiles.com/ugd/0d9a50_76025f18637444f28b83c33eaf147a2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_767516d29e734ebca158c269edd07f9c.pdf
    • https://static.usrfiles.com/ugd/c1615c_8228eec83f5f404394dd34ad6939640d.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_f721aa6745c24e6492722d46f1e03b42.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7d5c5353c0e4a96b9988c8d83e179ac.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_off00004923.bin
f1730667b964b590913841aa7113218f2b7b94669dd05a91144f2174a235dccd
pdf-font-stream PDF embedded font (sfnt) at offset 0x4923 5304 bytes
font_01_sfnt_off00005b46.bin
c772d238e82e2a2769e44398e64cd6c0b0615ac5179b6e40f8d4a1acc07a87ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B46 9136 bytes