Malicious PDF — malware analysis report

Static analysis result for SHA-256 152cdd18d1790410…

MALICIOUS

PDF

44.8 KB Created: 2020-08-21 10:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deea9850c345d2d195bd1dad3279e54e SHA-1: afa5fdfe3fe8cf4cd154ceae797cfad59fc06c78 SHA-256: 152cdd18d1790410594b3b4c5b0102cbabf67b3403ba6c1d82558a03c394f4b8
154 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 the URL https://ttraff.cc/pify?keyword=angela+lee+duckworth+grit+pdf. This URL is presented within the document body, suggesting an attempt to trick the user into clicking it. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm designed to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=angela+lee+duckworth+grit+pdf
    • http://wigisugol.irelandforme.com/uploads/1/3/1/3/131378970/2508744.pdf
    • http://files.martinecteachingportfolio.com/uploads/1/3/1/1/131163833/detasututi.pdf
    • http://zisafeza.jakyoga.com/uploads/1/3/2/6/132696056/sajaxitar_putibex_mazibogobavufu_fudapasemixa.pdf
    • http://files.madisonbizreview.com/uploads/1/3/2/6/132696029/5809701.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/91180902481.pdf
    • https://cdn.shopify.com/s/files/1/0433/4089/0280/files/janamevigireloxafafevo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1985/2187/files/jodaxajujevanejawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4339/7525/files/axar_publication_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/amablesser_mlindo_the_vocalist_video.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/80613479565.pdf
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/rheem_heat_pump_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/maledifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/dakurajolowidupudiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/autobiography_of_jose_rizal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000627f.bin
85a2201213dd3c066629c12ea29a24d79deae3089f14a16e8c1cef33f69feaf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627F 5268 bytes
font_01_sfnt_off0000746b.bin
d9ef874006238510f8c2e32de9579d54bd1ee914a5b6a64ec094fc31384f60b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746B 11548 bytes
font_02_sfnt_off00009800.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9800 4324 bytes

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