Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e0bb517af10c8f…

MALICIOUS

PDF

65.3 KB Created: 2020-10-01 13:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d803fdcc26d0f6e3076dbf74a127d49e SHA-1: 5582a0889127327731e35defd6d2101a89c3830b SHA-256: 84e0bb517af10c8fa4e25814388ca9c2137771b5f0a6ee5cfe321886ffd7cd35
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to various PDF download sites, masquerading as search results. The primary redirector URL is https://gettraff.ru/strik?keyword=warhammer+40k+astra+militarum+codex+pdf+download, which leads to a network of hosted PDFs. This indicates a likely SEO poisoning or traffic generation scheme, potentially leading to malware distribution or further phishing attempts.

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://gettraff.ru/strik?keyword=warhammer+40k+astra+militarum+codex+pdf+download
    • https://site-1037261.mozfiles.com/files/1037261/8989506560.pdf
    • https://site-1037274.mozfiles.com/files/1037274/81858177822.pdf
    • https://site-1036760.mozfiles.com/files/1036760/25419335728.pdf
    • http://files.puptown.org/uploads/1/3/0/7/130739993/xifov_piluzukixoxudi.pdf
    • http://savut.creativefoodart.com/uploads/1/3/0/7/130776299/f686b.pdf
    • http://files.gcpageants.com/uploads/1/3/1/4/131454035/08a60468c35.pdf
    • http://files.caliraeshautespot.com/uploads/1/3/2/7/132741029/lademonodubu_wabuniparinebex_genofepuj.pdf
    • http://mujarebe.soulfoodstudios.org/uploads/1/3/0/9/130969077/2795806.pdf
    • http://files.voltaglass.com/uploads/1/3/2/3/132303083/vipawoto_mogetoruf_lulopimig_pikazidon.pdf
    • http://files.garrettru.com/uploads/1/3/0/8/130814631/jaxiwam.pdf
    • http://files.miciqac.com/uploads/1/3/1/3/131383541/kozita_dizagewogewifa_kapuvisiv_dozodajutukela.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1bf.bin
3dab37344be4327f1319ca828df5f4a65af6b6412432f61aaf2fe723115de9d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BF 5744 bytes
font_01_sfnt_off0000c548.bin
4a000938f047dfe653c35d2cff1ef9f6b3a8ac55d9a4cdcaf1dc612c78440003
pdf-font-stream PDF embedded font (sfnt) at offset 0xC548 10644 bytes
font_02_sfnt_off0000e9c7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 4324 bytes