Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b72eb3f6d713ec4…

MALICIOUS

PDF

69.5 KB Created: 2020-08-02 23:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9248face44668555926ae1b4116a7aa1 SHA-1: 67a780810297deecbad651bb1651dec92ab1c2b6 SHA-256: 6b72eb3f6d713ec4c57ad5af57b2186df1ff6a4c406d389d3ef268a4d2da3934
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits characteristics of a PDF link farm, embedding a large number of external links, many pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=wedding+declaration+of+intent', reinforcing the redirector finding. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggests a phishing or malicious content delivery attempt.

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=wedding+declaration+of+intent
    • http://files.piecedoccasion.net/uploads/1/3/1/1/131163927/9c0811b562c5234.pdf
    • http://files.mareadingcouncil.com/uploads/1/3/0/7/130775970/bb414068.pdf
    • http://files.collettecollingeart.com/uploads/1/3/0/7/130775735/pofezibikamok_mopilaf_povebun_mobumuzonine.pdf
    • http://files.nadinenapear.com/uploads/1/3/1/4/131438499/xajuvixatez-tujata-dulelefalisi-wibiwixaguzawe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4214/files/safufasunejobusig.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/jelumujenezufujoxeguluk.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/xobimijuforazuwokizumezib.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/63811843629.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/sasivefuvudejisem.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/zusosolun.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/33804731024.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/32354343606.pdf
    • https://cdn.shopify.com/s/files/1/0427/7665/8087/files/conceptual_physics_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/lonab.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_off0000d47e.bin
d84c5f2fc63b8a12463e739b2dd39ce68e9b84c17b018ea812435dea377b089d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD47E 5024 bytes
font_01_sfnt_off0000e5b4.bin
75875d7cf13612ac73ce7fc52b3861dabc6d021e13dc4f128a3b62f8ee42cd39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B4 10276 bytes

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