Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e30e68c96694e4c…

MALICIOUS

PDF

36.6 KB Created: 2020-08-24 18:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d701b2ad889e3bfee2ebab0c7a65d4a SHA-1: 2e82a079add9a2ca5565231629e0fa4fd5cbc856 SHA-256: 0e30e68c96694e4cb935e6deaf93c26c07ee544ea97b65a5a3605102d4233a47
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector URL suggests an attempt to lead the user to harmful content, possibly for phishing or malware distribution.

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=bowflex+m7+manual
    • http://ropebifud.makefunoflife.net/uploads/1/3/0/9/130969858/sujogu_vudag_tufutumun_nefixa.pdf
    • http://sofogez.tlccasolafarms.com/uploads/1/3/1/3/131379730/8438514.pdf
    • http://files.la-fll.org/uploads/1/3/0/7/130775715/02a5b904e8c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3911/9765/files/text_twist_online.pdf
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/plentymarkets_handbuch.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/25498828906.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/tejobutopelokafon.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/73003012386.pdf
    • https://cdn.shopify.com/s/files/1/0437/5566/7605/files/gunilixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4541/files/accessory_organs_of_digestive_system.pdf
    • https://cdn.shopify.com/s/files/1/0432/7440/3996/files/vibemizaluke.pdf
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/stream_ecology_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7714/files/so_bernardo_graciliano_ramos_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0999/files/vimowokatuzusetisalizi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/40214440418.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_off000052d2.bin
01e2d682f9fe64d2419b5ac7771e9bf45eef854edd5d9a043a6c7303b8e01938
pdf-font-stream PDF embedded font (sfnt) at offset 0x52D2 4928 bytes
font_01_sfnt_off000063a8.bin
156e7f9acdf230529c2ff63f540440e435c8ef2c731db5bd17b3c621a024f23c
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 10084 bytes