Malicious PDF — malware analysis report

Static analysis result for SHA-256 e059b3cc7f836f45…

MALICIOUS

PDF

35.3 KB Created: 2020-09-14 12:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3a92dbec23c3e4eda1199c4c3d3cf20 SHA-1: 7bd803e39dd9fa424f2ce9195ed4f12ca5cd31df SHA-256: e059b3cc7f836f45b0bc0d135f7c4bc96277da360846a78c401ae6c461522bd5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm and a redirector suggests an attempt to lure users to potentially harmful sites, aligning with phishing or malware delivery tactics. No scripts were extracted, but the PDF structure itself is the attack vector.

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.club/wix?keyword=football+heads+game+friv
    • http://files.cwodforsenate.com/uploads/1/3/1/4/131453919/tumobunafe_dujixakuwitik.pdf
    • http://fomif.richardson-community-psychology.com/uploads/1/3/0/7/130739591/fovujebesofosu_gafisemobixuda.pdf
    • http://files.buildprinting.com/uploads/1/3/0/8/130813997/rinamavefa.pdf
    • http://wetuvu.thriveslc.org/uploads/1/3/0/7/130738836/kukurutedorojib.pdf
    • http://dimufukav.theconfidencevault.com/uploads/1/3/1/0/131070722/tuzap_kepetena_bifufi.pdf
    • https://static.usrfiles.com/ugd/384ea4_9341561ece8a4662b98ea9e15209c0ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_664361dce9974642b505ccc14f54d4f4.pdf
    • https://static.usrfiles.com/ugd/fbcb80_5054b29894eb4b4d8147054e97d056ca.pdf
    • https://static.usrfiles.com/ugd/e42c35_04c8c4bcf38d42eaa2efd808e4fbab2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_35bd4818978648018c63073c3b3f41d4.pdf
    • https://static.usrfiles.com/ugd/0010c8_8a7c91faa80a4e718058f8debbc8131a.pdf
    • https://cdn.shopify.com/s/files/1/0438/6933/9808/files/71253467411.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/38248880911.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_off00004b2e.bin
42fb8917a74d2ab910d7cde885ebb593e839a054f9fde6a5b4d61cee29c3766a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B2E 5476 bytes
font_01_sfnt_off00005da9.bin
c51db4bdf7eedad734e3813a3e4cbead272c11f03eb559cb1caf9066090dbd06
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA9 10280 bytes