Malicious PDF — malware analysis report

Static analysis result for SHA-256 945d6925445a832f…

MALICIOUS

PDF

40.7 KB Created: 2020-09-01 02:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeab4f3bd73fb978fe196b85c6e9c32c SHA-1: 17ac39dc4fe9f30dbe37e8263ee8ae35b6a9355f SHA-256: 945d6925445a832f8ab8d49237ca137aab24982f2dc697ef7ac45d85d41a03e9
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a search query for educational materials. This suggests a phishing or scam attempt. The document also hosts a large number of links to PDFs on Shopify, likely as part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly indicate a malicious intent to redirect users to harmful sites.

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/wix?keyword=direct+indirect+speech+worksheets+6th+grade
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/28054275415.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7474/files/neo6m_gps_module_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/54537807318.pdf
    • https://cdn.shopify.com/s/files/1/0431/5175/3380/files/lucida_blackletter_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/76470924697.pdf
    • https://cdn.shopify.com/s/files/1/0428/4514/3206/files/aashiqui_2_mashup_ringtone_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3899/files/pajarekulevod.pdf
    • https://cdn.shopify.com/s/files/1/0462/2906/1783/files/bdo_black_stone_farming.pdf
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/jodidomizodasivi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/gidivezimopebixoxejogami.pdf
    • https://static.usrfiles.com/ugd/f515ca_9ed720eb365d4530af3135f0f392237b.pdf
    • https://static.usrfiles.com/ugd/db1da1_bbea702731ca4faa81b130ac9be3f52d.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_35f9d37b01e24da7bd69dbe17e5ec268.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/essential_calculus_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/9272/8226/files/31487619186.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_off00006008.bin
6ee03a0b301c9243ff021ca33b37fa083cd9946ca44ce2842ede9e12251a450e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6008 5612 bytes
font_01_sfnt_off00007335.bin
4c0b36f69e7f71b4a6f54a2d86c0637daaa16fbfbe2117bd065ab7f4911af3fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7335 10372 bytes