Malicious PDF — malware analysis report

Static analysis result for SHA-256 e054b680e2007578…

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 23:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a69cc39e12f4d182db26ea89bce7bc2 SHA-1: ac5b00e317cd537527283be1f3b882522c9f2f79 SHA-256: e054b680e20075781b8dfcbb4d6532066e9b5b70c4c353b3923cdbcce6574bff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/pify?keyword=ssars+21+compilation+report+personal+financial+statements, which is part of a link farm pointing to various PDF files hosted on platforms like Shopify and other domains. The document body contains obfuscated text and the identified URLs, suggesting a lure to download further malicious content.

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.ru/pify?keyword=ssars+21+compilation+report+personal+financial+statements
    • http://zigoz.projecthealthycommunity.org/uploads/1/3/1/4/131406893/wizipaluxibur.pdf
    • http://rabexumik.rockanieguitars.com/uploads/1/3/0/7/130739173/tukezudiwudop_riser_kuzirevurik_vokozekarew.pdf
    • http://files.stephtalksfood.com/uploads/1/3/2/7/132740711/6471186.pdf
    • http://files.ajgatespro.co.nz/uploads/1/3/2/3/132303170/fufokejivepiwozij.pdf
    • http://lebovu.mcwoodturnings.com/uploads/1/3/1/3/131380550/9233931.pdf
    • https://cdn.shopify.com/s/files/1/0432/0123/3053/files/antigenos_febriles.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/10285270181.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/lixawotelude.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/rotezuxitikaxuzalop.pdf
    • https://cdn.shopify.com/s/files/1/0433/4210/2679/files/dowakirexexalazix.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/46503468900.pdf
    • https://cdn.shopify.com/s/files/1/0431/1167/8114/files/27996726635.pdf
    • https://cdn.shopify.com/s/files/1/0459/7340/5863/files/junoxasowujomedufaxuvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/71267300178.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005aea.bin
a6e7ddec57fd554eb7030317111221f22e6085520afbd1b95c433b1195978a2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEA 5448 bytes
font_01_sfnt_off00006d55.bin
5bbf4fbdb043e4ec1063bdea31a77734d53f3d4839f9dac1c261399f90077d49
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D55 11112 bytes