Malicious PDF — malware analysis report

Static analysis result for SHA-256 16dfacaa08c8f150…

MALICIOUS

PDF

43.0 KB Created: 2020-08-11 21:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: affb41599ac8e7f3b50a0fba996bc02d SHA-1: 0b056c583a2a97986765bece7c1ae2dc620e28a9 SHA-256: 16dfacaa08c8f150a7cf9bb72028293f8329325192f9fe8c07861155ec36ef29
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains references to the redirector URL and other benign-looking PDF links, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of a malicious redirector indicates an attempt to lead the user to harmful content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=new+york+bartender+s+guide+pdf
    • http://files.mytokyoguide.com/uploads/1/3/0/9/130969809/vububu.pdf
    • http://wabefaxa.thewomaninamask.com/uploads/1/3/1/3/131379732/8a55ce15d1ccc.pdf
    • http://gebep.writing.halfsky.org/uploads/1/3/1/4/131407406/7338364.pdf
    • http://files.rockymountainjackpotshowseries.com/uploads/1/3/1/6/131607117/d1e523017225ab.pdf
    • http://files.darrenroesch.com/uploads/1/3/1/3/131380730/3816198.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1801/8203/files/xamilekufofuwiwudugun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/beginners_guitar_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/83999327611.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0296/files/tipogukolinujil.pdf
    • https://cdn.shopify.com/s/files/1/0433/8352/1445/files/xetuwudupumadi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/training_needs_analysis_process.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/pixuxoka.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/sony_str-_dn1050_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/btl_vanquish_me.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/40107982264.pdf
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/changes_black_sabbath_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/lepukumaginalenufa.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_off00006809.bin
c850833b679db05096b0ec7b9c72efde0810b50ad62c4db4cb43a7ab00a7ec0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6809 5544 bytes
font_01_sfnt_off00007b18.bin
91503a34d895a37e3e71c415f4484036a7f3648cc82ab4b1266007cdc810495f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B18 10500 bytes

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