Malicious PDF — malware analysis report

Static analysis result for SHA-256 5993f002acd99281…

MALICIOUS

PDF

53.2 KB Created: 2020-08-18 22:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5624624c68bdd8098dae535dd9ecd4c SHA-1: 48dbbf6e79ca7225c9d141b076b4f5e3f5a1f2b8 SHA-256: 5993f002acd992813be20205ab651a4262327b9fcc0b90af2405abfa26fbb232
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=2017+htn+guidelines+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The embedded document body, though heavily obfuscated, contains the malicious URL, suggesting the document's primary purpose is to lure users to this external site.

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=2017+htn+guidelines+pdf
    • http://files.vpsareunion.com/uploads/1/3/0/7/130740097/dazexigejefedi.pdf
    • http://files.celebrategreaterplymouth.org/uploads/1/3/2/7/132712558/pigefisop-zugizijototasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1553/files/evaluating_logarithmic_functions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/bawapenujipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/98032534273.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/16340820723.pdf
    • https://cdn.shopify.com/s/files/1/0444/3540/7014/files/amagi_brilliant_park_episode_1_eng_dub.pdf
    • https://cdn.shopify.com/s/files/1/0432/2400/6820/files/xedagibutuvusunanafitona.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/mercruiser_3._0_service_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/govikozazagitakibuzoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7174/files/35357687095.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/30271956620.pdf
    • https://cdn.shopify.com/s/files/1/0436/2895/3763/files/minecraft_pe_skin_stealer.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_off000082e5.bin
9966b03c07caa22db9f96bb0bc0d6254064559287d9026bea1ed7d4c73414fd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x82E5 5080 bytes
font_01_sfnt_off00009434.bin
97fcada2d94b4066cd9b068ae79f1491bbbf7bf20686e734a3ed7f63473cee7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9434 11084 bytes
font_02_sfnt_off0000b9b7.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B7 4324 bytes