Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d49a2879b9cb324…

MALICIOUS

PDF

42.5 KB Created: 2020-08-08 20:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3a1b332dc24be119fb67a7390e128d5 SHA-1: eca4cef8744902941ea62907c7dc5799a4775212 SHA-256: 7d49a2879b9cb324cd45c408c3480540c6d6ae416fe34aa8b92508083df7683f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. This suggests the document is designed to lead users to malicious websites, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

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=bundeskanzler+liste+pdf
    • http://files.citrustreeyoga.com/uploads/1/3/1/4/131437444/ad831ffe5d756.pdf
    • http://files.fbcmexico.com/uploads/1/3/1/3/131398102/8465773.pdf
    • http://wanolaten.rawearth.ca/uploads/1/3/2/6/132681947/ruxabevuloz.pdf
    • http://files.chino77thcavalry.com/uploads/1/3/2/7/132740545/busiva-xifebojetata-vidugazukijelu-madifodezit.pdf
    • http://files.cothrons.com/uploads/1/3/0/7/130775640/mugibufufomode_vozuzawenali_xagodufoxigesij_febotukidur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/wugosuwelesejoguz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/monster_blood_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/lagless_shaders_mod.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3151/files/dulunusomojukosuxebap.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/9582409147.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/munanavodised.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/todalevisilusid.pdf
    • https://cdn.shopify.com/s/files/1/0434/2952/7709/files/warhammer_rulebook_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/lafozubekosuvun.pdf
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/foride.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/5045037968.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_off000066a5.bin
38a592843f22e93ed943fd8a5171fa61dbb5ac41ee3c39ed4b2f809d738ef39d
pdf-font-stream PDF embedded font (sfnt) at offset 0x66A5 5196 bytes
font_01_sfnt_off0000786e.bin
5fd6e639d7027ea14e05cbd7e4ff7de62a962541c13ad3595fce0767325ae325
pdf-font-stream PDF embedded font (sfnt) at offset 0x786E 10776 bytes