Malicious PDF — malware analysis report

Static analysis result for SHA-256 652e7b542c4e301e…

MALICIOUS

PDF

52.9 KB Created: 2020-08-14 21:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8371b3fb51425b79c1d82242b75527d8 SHA-1: 6f13dba0c6d9b3c6dcf27583b91facb021b337cb SHA-256: 652e7b542c4e301eaad1271a1f988dcb29924bfd9738bd1164102128389fbceb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm designed to inflate SEO or distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=platform+77+williamstown'. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=platform+77+williamstown
    • http://files.salernoprotectiveservices.com/uploads/1/3/1/6/131606407/gupulese.pdf
    • http://files.trueembodiment.com/uploads/1/3/0/9/130969300/7937817.pdf
    • http://mobajav.singingsawpress.com/uploads/1/3/1/3/131380213/00d70fa6a.pdf
    • http://xapuza.sapritalia.com/uploads/1/3/0/7/130738914/dimuri.pdf
    • http://files.harvestclevelandne.org/uploads/1/3/0/7/130776257/5128737.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/los_arcturianos.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/53631854673.pdf
    • https://cdn.shopify.com/s/files/1/0429/7601/8585/files/maytag_centennial_washer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7750/9020/files/paxideguxodebawerojirage.pdf
    • https://cdn.shopify.com/s/files/1/0436/0739/2413/files/encephalite_a_vih.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1767/files/jiwelakubugoxusenexe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3699/7782/files/92518424012.pdf
    • https://cdn.shopify.com/s/files/1/0432/8429/9936/files/46729938217.pdf
    • https://cdn.shopify.com/s/files/1/0437/9456/3229/files/brand_value_vs_brand_equity.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_off00009200.bin
6cc130af2ca55ecb8a9daff3e7e13e8e42da4042faa4601cd7277a71d63e619b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9200 5088 bytes
font_01_sfnt_off0000a348.bin
f028604fadd7e72be9f204aaeeb6bf9a480fa3cf340c0007f39924a94bced1db
pdf-font-stream PDF embedded font (sfnt) at offset 0xA348 10472 bytes