Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ffe5e29465073b…

MALICIOUS

PDF

30.9 KB Created: 2020-08-23 00:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c95b11319d72ce8ba39cad1f55d70fd SHA-1: 8054303c6f6c23575cd1d7d5c5322d9ed730d842 SHA-256: 59ffe5e29465073b0e8e0a535626a5f9b7533ea3760535fcc27fa628dfb9778c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override

The PDF contains a large number of embedded links, with the primary link pointing to a redirector service (ttraff.cc). This suggests a phishing or malicious content delivery attempt where the redirector is used to obscure the final destination. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is heavily obfuscated.

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=aradhana+new+video+song
    • http://bomevis.saharaseniorservices.com/uploads/1/3/1/3/131384403/kivometo-nikatiripak-petujuvogomid-bidawo.pdf
    • http://files.roborebels.com/uploads/1/3/0/8/130813837/nuneguw.pdf
    • http://files.ambitupstate.com/uploads/1/3/0/8/130813985/nadarig.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9499/files/turn_down_for_what_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/47051987465.pdf
    • https://cdn.shopify.com/s/files/1/0430/2913/5521/files/panago_pizza_menu.pdf
    • https://cdn.shopify.com/s/files/1/0460/1158/0575/files/fivitotogiduwez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/79831738261.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5632/files/bebuwixel.pdf
    • https://cdn.shopify.com/s/files/1/0440/8734/5304/files/apostila_para_auditor_fiscal.pdf
    • https://cdn.shopify.com/s/files/1/0435/9133/6099/files/48178026161.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3408/files/behaviour_therapy_book.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_off00003f5e.bin
ec57f6b1bd32cda25730f2058fd77eab47161210d5b39e7ae086eb442ff10439
pdf-font-stream PDF embedded font (sfnt) at offset 0x3F5E 5196 bytes
font_01_sfnt_off00005119.bin
c1c8fbffa642b69726cd99088036b019d37d1baf388c87543dc5d5f262c0ac5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5119 8816 bytes