Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d821cb51c33d74…

MALICIOUS

PDF

39.8 KB Created: 2020-08-25 04:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1ffb1ccc4d6e37c545c8d0c3eae58df SHA-1: 88116a464cc64a88cffd5d9f8235187dbc60cc82 SHA-256: 49d821cb51c33d74a08669ba84b1f7ad5c8c809900101d1c595d137c23f6abe3
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=ghost+face+template+printable'. This URL is presented within the document body, disguised as a printable ghost face template, likely to trick users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, but one critical link leads to malicious infrastructure. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=ghost+face+template+printable
    • http://vuwasar.wendycooneylightingdesign.com/uploads/1/3/1/4/131438110/2893348.pdf
    • http://files.chapinmarino.com/uploads/1/3/0/8/130814605/4090713.pdf
    • http://files.cjsprofessionalcleaning.com/uploads/1/3/1/6/131606094/jivanuroxox.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/43969112361.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/vomoniwuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/42386158245.pdf
    • https://cdn.shopify.com/s/files/1/0438/8211/9323/files/warcraft_3_frozen_throne_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/58619867669.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/brighthouse_channel_lineup.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/ilac_rule_of_law_assessment_report.pdf
    • https://cdn.shopify.com/s/files/1/0446/7628/4569/files/criminal_psychology_navin_kumar.pdf
    • https://cdn.shopify.com/s/files/1/0429/3459/9843/files/rodney_o_joe_coolie.pdf
    • https://cdn.shopify.com/s/files/1/0431/6427/0743/files/tipebukoba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/rofizexog.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_off00005dad.bin
b3d290ac0d2bf62540b6584a6cc88378c4ff74cd596f990fde8d4a63e4c0ef98
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAD 5428 bytes
font_01_sfnt_off00006ffa.bin
9b67a6e80cd152522fcca4020f3c867cb320fc2b2ac336aa2125830bdf1c310c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFA 10172 bytes