Malicious PDF — malware analysis report

Static analysis result for SHA-256 7043924d7feff3b7…

MALICIOUS

PDF

61.6 KB Created: 2020-08-21 10:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8283282b635ef1e7c2945388f76c4e8 SHA-1: 19e35ffbe9d3c004c15134f6871ea47e0f56768e SHA-256: 7043924d7feff3b70cf320e8663e76c72eb6b07b3df7a2aff943255fbdec70a2
194 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure for a guide, and the presence of numerous links suggests a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness, and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic to bypass gateway scanning.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=axiom+verge+secret+world+guide
    • http://pedipugo.mariannephinney.com/uploads/1/3/1/3/131380349/07804c7.pdf
    • http://files.sarasotacommunitychurch.org/uploads/1/3/1/4/131483143/9bb3b724b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/rixikegurasaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/background_color_image.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/4205239959.pdf
    • https://cdn.shopify.com/s/files/1/0432/3432/8735/files/dasewevaruvimivolam.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/85403865640.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/nigamevogebugon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81988232477.pdf
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/morix.pdf
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/95500468800.pdf
    • https://cdn.shopify.com/s/files/1/0447/4486/7994/files/3125989651.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2c7.bin
d6b4710558a0b90b38ef7b0e969d287631d60b77dd41659eb49646537cc2b69a
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C7 5260 bytes
font_01_sfnt_off0000c4ac.bin
10c23c6667aed940f746758075cf7552e68d292d8f34b69c1f78b1a35d2db4dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AC 11032 bytes