Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b77f152efe2be1…

MALICIOUS

PDF

93.7 KB Created: 2020-08-12 14:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bafbccacc202a81f22a5c658071d066 SHA-1: 3d1f3ba676e5b1f03e09d794df1254736cfac0f4 SHA-256: 06b77f152efe2be1304c143ecfffb3c84b2186df6318636252b97bc5f47b97f5
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify-hosted PDFs. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=breadfruit+benefits+pdf
    • http://files.pawneeil.net/uploads/1/3/2/3/132303329/6881745.pdf
    • http://gesani.reachhigheraugusta.org/uploads/1/3/2/6/132682883/runologabog.pdf
    • http://files.cardiffflyers.com/uploads/1/3/1/4/131438071/nufunaxetadoka_gonan.pdf
    • http://kafoti.mylocalguideistanbul.com/uploads/1/3/1/0/131070152/a6066312187.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/how_to_customize_a_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/renesorazudavokuxeta.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/10181207426.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/92682478039.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/61503635828.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/73041609305.pdf
    • https://cdn.shopify.com/s/files/1/0434/7854/8630/files/ffxiv_miner_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/zurefaguvikizagupuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/zujatetofasadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38804475130.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/88114212433.pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/sokarugenexe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/gidurakisebe.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_off000132b3.bin
c1ab916fa9acf609ca9dfdf1e2c7d25063f3991b2a936ef4927cfdec2415d7c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132B3 5192 bytes
font_01_sfnt_off0001445c.bin
44631663a6621af18406da5541e95654f0d4456f9a8a09041966d2a7d5a6c4ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1445C 11000 bytes

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