Malicious PDF — malware analysis report

Static analysis result for SHA-256 75cc389ffb46faa2…

MALICIOUS

PDF

41.6 KB Created: 2020-08-17 15:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ba777a33f392c838dd0aeb7968d8030 SHA-1: dd1f73bff6c360411fd6b4223a0199c1d24e86b7 SHA-256: 75cc389ffb46faa2a753831694b861deeb5877429fbbeb34a10591ba8ded7103
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt to mask the malicious redirector. The ML classifier also strongly indicated maliciousness.

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=best+space+shooter+games+for+android
    • http://files.hugsplus.com/uploads/1/3/0/7/130776180/muxumudugal.pdf
    • http://tugufej.thebackyardsalad.com/uploads/1/3/0/7/130740221/2282036.pdf
    • http://bunepo.churchillstablesma.com/uploads/1/3/1/4/131407440/werir-piwagalaxadoz-kudakuzexerapog-wokegaso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3463/2607/files/24712618249.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/6004492109.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/21558976846.pdf
    • https://cdn.shopify.com/s/files/1/0434/4171/7414/files/runitufulekawujefazidil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/gobulewoxolize.pdf
    • https://cdn.shopify.com/s/files/1/0434/8932/9312/files/63306728535.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/satisfactory_alpha_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/birakadesov.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/9292119868.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/medicinal_uses_of_aloe_vera.pdf
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/genetics_definition_biology.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/13287647835.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/lokevitovitofuroge.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_off000063cd.bin
d3ee253b113b9edd289d573dfae5a93487f08ed7ef64fa6f290c2e86435800f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x63CD 5588 bytes
font_01_sfnt_off000076a8.bin
abab0591c6679c48143e5ffc689ac3529742fd8e66a56be93cb4543527e024b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A8 10212 bytes