Malicious PDF — malware analysis report

Static analysis result for SHA-256 792efb33396854f7…

MALICIOUS

PDF

40.5 KB Created: 2020-08-11 13:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 136b6fb801a687dabb07c252f4c46438 SHA-1: 753a03524ca80db6a7f0b35b3cbcc182d08490b3 SHA-256: 792efb33396854f71b498dd329726028c6f075b07d1ffd81cc6833d9b78d9e5b
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, disguised as a free book download. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute malicious content. The embedded URL `https://ttraff.com/pify?keyword=general+biology+1+book+pdf+free+download` is the primary indicator of malicious intent, likely leading to a phishing or malware download 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=general+biology+1+book+pdf+free+download
    • http://woxakaw.shorewoodculinaryarts.org/uploads/1/3/0/8/130874655/21940.pdf
    • http://files.ellabonitastores.com/uploads/1/3/1/8/131856519/kazikesabi-xelokamebegu.pdf
    • http://fikitut.splashdogwashing.com/uploads/1/3/0/8/130873851/4633240.pdf
    • http://files.ratoathbadminton.com/uploads/1/3/1/4/131438839/vuzefoziwi.pdf
    • http://files.f-c-f.net/uploads/1/3/1/4/131407183/nivexapitatat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/free_bible_download_niv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/calculus_analytic_geometry_larson.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/fozixafavibologijumatot.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/jisefetuwufik.pdf
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/convert_idml_to.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/91909202603.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8359/files/lavugepifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/zazisetivepixenob.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/nuwamaforubulogidisisow.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/mutual_lease_termination_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0431/2324/5216/files/32581046996.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/asidosis_metabolik_pada_gagal_ginjal.pdf
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/didenanulotadokerub.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_off00005e3e.bin
3b8476b0bacb4057b0e5980cfbfcba666ff9f00c5f21aacc17a04da6441ae790		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3E 5512 bytes
font_01_sfnt_off00007134.bin
f86c4ecf0c58e57cb8f49988d94eef4c5760a30d22487814c515ce9974c2e7b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7134 10352 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.