Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e56c4a4a29f9e9…

MALICIOUS

PDF

53.0 KB Created: 2020-07-12 23:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 380f2060d937129687ab48bdf8b4e94f SHA-1: 3cff48a8a8466283fec47b8a1ff72e13a1725f53 SHA-256: b7e56c4a4a29f9e98b356ad2b7f0041bc2eea72dc387dbc7c0a9fdac232bcd1f
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure for a user manual. The presence of a link farm and a critical redirector firing strongly suggests this document is designed to lead users to malicious websites 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/wb?keyword=evoluent%20vertical%20mouse%20user%20manual
    • http://files.kimgibbens.com/uploads/1/3/2/7/132710748/5824905.pdf
    • http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.pdf
    • http://files.siglersocalengineering.com/uploads/1/3/2/8/132814415/cee0f14e3b04f3.pdf
    • http://files.pharmbytes.org/uploads/1/3/1/3/131380759/de6e3beb7c15f2.pdf
    • http://files.bbflockling.com/uploads/1/3/0/9/130969655/junagobep-sidigaxaw.pdf
    • http://files.cassandralaurion.com/uploads/1/3/1/6/131636946/mokapipuxe-xaxaxavedeja-ruzafe-tasimifuvadexew.pdf
    • http://files.westsideestates.com/uploads/1/3/1/4/131437423/c42a09e.pdf
    • http://files.assistanceleaguecincinnati.org/uploads/1/3/0/7/130775942/5032da7185.pdf
    • http://files.lucioconstructioninc.com/uploads/1/3/2/6/132696044/bufutukibeli_wororubuj_nisafelun.pdf
    • http://files.bbflockling.c
    • https://vajowobago.files.wordpress.com/2020/07/jetav.pdf
    • https://kadipelo.files.wordpress.com/2020/06/tusaradedubuxijubupetin.pdf
    • https://vunafafop.files.wordpress.com/2020/07/6819630110.pdf
    • https://lamofozeguve.files.wordpress.com/2020/06/49281445267.pdf
    • https://kogezes.files.wordpress.com/2020/06/69180010673.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/bolagogidago.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/52806954104.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/34623056438.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67295211500.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59677855830.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_off0000932f.bin
02f4e2d0cc4c75ed5a198dc7294fa5994c899d06bc31886704410d27b7569384		 pdf-font-stream PDF embedded font (sfnt) at offset 0x932F 4844 bytes
font_01_sfnt_off0000a395.bin
49d5afc08d21e390a3752eac76fd2898972815c27d86a1ec1c948c5e204732b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA395 10212 bytes

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