Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b772a4f1348946…

MALICIOUS

PDF

46.6 KB Created: 2020-07-29 22:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cce4dd9e049413b9aa3cbda99781a146 SHA-1: 5a2b198b69a0dfcaf42287ad9e79380fbd245be1 SHA-256: 17b772a4f13489461dfad22c6043838d8780dbdc2b7c13ab0c573ffcaaf2b8a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document's structure and link farm indicate an attempt to drive traffic to potentially malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the heuristic firings strongly suggest 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.com/pify?keyword=unipolar+depression+vs+bipolar+depression+pdf
    • http://files.northspraychristianchurch.com/uploads/1/3/0/8/130814630/wobonipop.pdf
    • http://files.jsucontestofchampions.com/uploads/1/3/0/8/130813701/dafaba.pdf
    • http://files.musicalfuturesaustralia.org/uploads/1/3/1/4/131453793/lapunelasid_wonisaxamawot_soves_rokeridevuva.pdf
    • http://files.dougheilman.com/uploads/1/3/0/8/130813643/tubirugum.pdf
    • http://files.evolution-erie.com/uploads/1/3/0/7/130739169/381423.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/4278498701.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/8529369710.pdf
    • https://cdn.shopify.com/s/files/1/0438/6121/3344/files/gaduvetufereperuzefu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/suxidojodamumijamisafeko.pdf
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/86753896266.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2445/files/tipup.pdf
    • https://cdn.shopify.com/s/files/1/0439/1269/1867/files/dabimulukavufulawulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9942/2871/files/60386327688.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/83828360784.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_off00007a70.bin
e332faefe90757859bac80daae8e17ee11263de6171676448056ca561eb0120c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A70 4936 bytes
font_01_sfnt_off00008b2c.bin
e14eddc0273c3d40dedc50e06093ac32604ef642952445e44c0ea02bd1581987
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2C 9904 bytes