Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd703d7d808e576…

MALICIOUS

PDF

46.5 KB Created: 2020-08-30 21:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 759e25470526fccc7b8db2c379408fc6 SHA-1: 4e4e51d39b1ed4ff35dcc8dca1fe319024ba691e SHA-256: 6fd703d7d808e576523cff72604a01e01fff871a9bf53f3f22b07fe35a1d4158
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a large number of external links suggests a link farm or SEO manipulation tactic, likely intended to drive traffic to 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.ru/wix?keyword=fisica+general+carlos+gutierrez+aranzeta
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d89f4c1daefa4a51ba6be8fbc032956c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8810646556304b8db3d75e64039a340e.pdf
    • https://static.usrfiles.com/ugd/704566_afe29d7dc02f4ecda87a684cd7be58c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c28722ba0fb4ef7952034c59dc9e030.pdf
    • https://static.usrfiles.com/ugd/77d535_4c16c8d756cf4b8ea6758400cd20e58e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c07078fac9d04a0caddf1b60a8167997.pdf
    • https://static.usrfiles.com/ugd/191a6d_217bc15857184e12a77106e5766985b2.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/1229603873.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/benim_hocam_maliye_video_ders_notlar.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/suvafez.pdf
    • https://cdn.shopify.com/s/files/1/0436/3757/1744/files/riwoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6345/files/20059866058.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005785.bin
280bb5d554949db06692b7ef6be8ecd4684591ce04ee84f41594352dfff855c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5785 4972 bytes
font_01_sfnt_off00006880.bin
542081aee67b8f5d823b0748bcf4c248db7d30d887c025ff58a2465b41a25c1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6880 14708 bytes
font_02_sfnt_off000095d4.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x95D4 16204 bytes