Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae9ee296cd94ae9…

MALICIOUS

PDF

42.7 KB Created: 2020-09-17 21:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64c377ed30af92a91ca67dbe652a6434 SHA-1: 768eab1e24c6a318f92dd48e4a588bd141beaca8 SHA-256: 5ae9ee296cd94ae95148d8c74bbf3cafcf097a0b6b4793480ad8152a0a94229e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are consistent with a link farm or phishing attempt, likely intended to redirect users to malicious sites.

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.me/wix?keyword=sangamon+valley+conference+junior+high
    • http://files.torchpub.com/uploads/1/3/1/4/131406379/ae525.pdf
    • http://files.thewitchsranchandhomestead.com/uploads/1/3/1/4/131407704/8938491.pdf
    • http://jugeto.welcome2theleftcoast.com/uploads/1/3/1/3/131380594/2534e2b6cda1cd.pdf
    • http://bepeteli.learningcafe.us/uploads/1/3/0/7/130740112/kebagejisaju.pdf
    • http://xanasam.mtziongrandy.org/uploads/1/3/0/8/130814328/gekekilidutonis_zuwenujadu_wiloje_taganufusapapo.pdf
    • http://tagijane.oandaeveryday.com/uploads/1/3/2/6/132681670/kepazexav.pdf
    • http://maxap.alphaesqcleveland.com/uploads/1/3/2/6/132681300/491ff.pdf
    • http://vowoxeva.southdevonslinglibrary.com/uploads/1/3/2/7/132740267/feratasupa-savepaxifikano-rusipuzit-kepazeve.pdf
    • http://ketitimu.myapplecrisp.com/uploads/1/3/2/7/132712354/joravubedifu.pdf
    • http://files.cottageforrentontario.ca/uploads/1/3/0/7/130775249/fetowexawaveturarepi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/wukiluvuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1866/files/17700521796.pdf
    • https://cdn.shopify.com/s/files/1/0432/4084/9575/files/carrier_infinity_heat_pump_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8032/files/film_bliss_1997.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_off000068cd.bin
79dbf0c8585ea768329592d38e9703d163670d365973a07e3b45105b5c4652a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x68CD 5456 bytes
font_01_sfnt_off00007b4a.bin
9b33e6a7794c510244b236dec119950a88f93bc363f8e2b8e96d7832f45203bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4A 9956 bytes