Malicious PDF — malware analysis report

Static analysis result for SHA-256 926e489a9fa3db8c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-03 04:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeb189ac30a87ae7ab4af890870d052c SHA-1: dc34f83c6e2fd67a81923fd9604923142724ac09 SHA-256: 926e489a9fa3db8c63f0dcb2f5e27732113202daa8a7d0a6b2e26f8c787b12f3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link pointing to `https://ttraff.ru/pify?keyword=p90x+workout+routine+pdf`. This indicates a social engineering attempt to lure users to malicious infrastructure, likely for further exploitation or credential harvesting. The ML classifier strongly supports the malicious nature of this PDF.

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=p90x+workout+routine+pdf
    • http://files.tilttrucksaccessories.com/uploads/1/3/1/4/131437362/9b5bb4e02b48c.pdf
    • http://files.botlmovie.com/uploads/1/3/0/9/130969724/gejezupit.pdf
    • http://files.victorianhighcountryphotography.com/uploads/1/3/1/4/131408664/rugidakiwuxawu-favevozul-nolesowezijek-kofepufud.pdf
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/vebitemufexuzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/tekax.pdf
    • https://cdn.shopify.com/s/files/1/0436/6378/6137/files/womaseku.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/45576417339.pdf
    • https://cdn.shopify.com/s/files/1/0429/7470/7868/files/wolf_of_wall_street_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89853177043.pdf
    • https://cdn.shopify.com/s/files/1/0429/2247/5687/files/81214457030.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/3000/files/xixoxokamixagaxiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/xifawofegemiruxeveber.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/notasanugimelilivugef.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/44869521767.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/komokerofurixanesamufiran.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_off00005e61.bin
5a5f7701c887e12f60fc143300d9c19fcf134c80605391b929ba82e640e6c30f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E61 5020 bytes
font_01_sfnt_off00006f93.bin
d66bec29ca4939264514f9f892928e7b219b8a17fc9dcb97ede810ce7412c043
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F93 10224 bytes
font_02_sfnt_off000091ef.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x91EF 4324 bytes