Malicious PDF — malware analysis report

Static analysis result for SHA-256 2837ba7938883243…

MALICIOUS

PDF

43.9 KB Created: 2020-08-19 15:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d6935693ed067558ace173d5b8c5bb0 SHA-1: 8269858ff45dfe5a5c31f3b4fa206e28e532c949 SHA-256: 2837ba79388832431a8b3eb4211113eec14b2cdda800dd71b648109ee339ef70
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The document body contains garbled text but includes the URL 'https://ttraff.com/pify?keyword=jinja+template+variables+list', reinforcing the redirector finding.

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/pify?keyword=jinja+template+variables+list
    • http://resixu.stewartislandhelicopters.co.nz/uploads/1/3/0/7/130775203/suwagefudabejib_deloledi_kebufesu.pdf
    • http://files.lavernemleonard.com/uploads/1/3/1/3/131381946/vuriwer.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/flight_aerodynamics.pdf
    • https://cdn.shopify.com/s/files/1/0435/3730/1653/files/wovajuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/church_posters_templates.pdf
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/44997809957.pdf
    • https://cdn.shopify.com/s/files/1/0452/3737/1037/files/salvation_army_donation_value_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/keller_williams_business_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1712/files/linatimafej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005919.bin
5fd2c78314a5eac64842d246db49db5f19db77e02649e4a16104ecb5f7d64c22
pdf-font-stream PDF embedded font (sfnt) at offset 0x5919 4908 bytes
font_01_sfnt_off0000699e.bin
df472bcaf1f546ccd59347ce56cfee0c3e094dfb8315f4ea94c4eba8230f2d14
pdf-font-stream PDF embedded font (sfnt) at offset 0x699E 13516 bytes
font_02_sfnt_off00009504.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9504 4324 bytes