Malicious PDF — malware analysis report

Static analysis result for SHA-256 0923900c1cc8a934…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 23:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc17734eaa5334d45cade59738e3ae71 SHA-1: efbc92e90f5317f94c19b7fecea2130249846bf0 SHA-256: 0923900c1cc8a934f59f9b33830ca2a209a5b82e25a683ee58de41e1bae1a8fd
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and numerous other links, many of which are benign Shopify links, but some are unknown. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=ebook+awaken+the+giant+within+indonesia
    • http://files.vickylillaart.com/uploads/1/3/1/4/131482941/2397177.pdf
    • http://fopazif.titansinvite.com/uploads/1/3/0/7/130776255/ramiwuzaju_tirotuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/honda_accord_wiring_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5547/files/winanit.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/automated_manual_transmission_working.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/79256800608.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0166/files/25782165414.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/pomavizonidizexep.pdf
    • https://cdn.shopify.com/s/files/1/0433/7411/7015/files/fdmr_name_ringtone_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/83135513708.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/ketozizaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/80232397285.pdf
    • https://cdn.shopify.com/s/files/1/0439/3048/4904/files/20946284019.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_off00005ee6.bin
66303f541301a0403dbbc3f14fe4df7c542d09e0955ae153ea0532b81312c464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE6 5212 bytes
font_01_sfnt_off000070ba.bin
f23f69d92a0913bc6f8dc454e350514217287ae864b329c166d0f6791ce21533		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BA 14260 bytes

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