Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ede1948302131f8…

MALICIOUS

PDF

43.4 KB Created: 2020-09-02 00:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fb90d608bcb7522f8daa92d4e8601f7 SHA-1: 8dff219a5892ea1d28bb2f560d833e8ae493b43f SHA-256: 0ede1948302131f89f2b57f059bcdd1b7e284e34c7b81ce678b47d32b2678035
174 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though obfuscated, contains a URL that matches the malicious redirector identified by heuristics, suggesting an attempt to lead the user to malicious content or a phishing page. The presence of many external links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/pify?keyword=grille+tarifaire+cdiscount+energie+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/ce0e6d_99f41c6c77614f68ae54c695aded81ce.pdf
    • https://static.usrfiles.com/ugd/7598fa_d137a67889264bc4b363e0a33748a142.pdf
    • https://static.usrfiles.com/ugd/bf650e_84452f8a8fea4f648e1a9f3993cd5363.pdf
    • https://static.usrfiles.com/ugd/80bfa9_48dc6e01a31e4ea0bd7537431c0c5b6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0ce30be00e344cbada7ca0ea8cfc5bf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/dimamo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/6095329796.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6080/files/saucony_women_s_guide_8_running_shoe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/tab_dividers_that_work_with_sheet_protectors.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/votupigurujarakovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/tom_cruise_biography.pdf
    • https://static.usrfiles.com/ugd/09273f_28fa8df444654ab1ac4c5b30190c3658.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_04b56251669c4663bb558d5d9ed7a01a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec75e064e67140e6a819ade02fb77d06.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e3c.bin
17523387ba786ecd51eb06b46a1bcfecc60c11f9cbd3aab8913231f47ea6e6c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3C 5236 bytes
font_01_sfnt_off0000701c.bin
e066425ed671be863c0af67489f07d8de735106fbdd3b7aa7a8749af3c283d9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701C 10096 bytes
font_02_sfnt_off000092a7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A7 4324 bytes

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