Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af90218d0abb509…

MALICIOUS

PDF

50.0 KB Created: 2020-08-25 02:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb40fc07f832b3fbd16ce8740dc69bf6 SHA-1: 0891fab856f86538ede65618980a897832c19dcd SHA-256: 3af90218d0abb509e464c2bba06e78fe5f3a3c838d7c17286bb8f20c4a5ef250
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=abcd+2+full+hd+movie+free'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same lure text and the malicious URL. 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=abcd+2+full+hd+movie+free
    • http://bodikud.arturoaguilarphoto.com/uploads/1/3/1/3/131381679/fixukumodedinapap.pdf
    • http://files.rapidrealestatevideo.com/uploads/1/3/0/8/130873855/3dc26ebc80d.pdf
    • http://files.djcattrellauthor.com/uploads/1/3/1/3/131383297/papolelowi.pdf
    • http://tonap.treeoflifeph.com/uploads/1/3/0/8/130814017/roliderago_mowop.pdf
    • http://files.kocanada-usa.com/uploads/1/3/1/4/131437538/zorodoke.pdf
    • https://cdn.shopify.com/s/files/1/0429/3738/5123/files/kathi_songs_maango._me.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/ruwelogoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/75945915556.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7417/files/63629656780.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/73460617782.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jatebilebasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/84279742894.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/77953197897.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/mabodokarunofubibuke.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3157/files/nuwoxusatefavobokibof.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/ftce_math_5-_9_practice_test.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c0.bin
8ae31c6286b9feb625957869d4151567203c4dd405bb08da7d5d493bdcc35b34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C0 5196 bytes
font_01_sfnt_off00007545.bin
4f2ff8b1c846f4c50a9e2dc648bc1630ade0a9e2f67e073b933ff9d86b5ec8f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7545 2736 bytes
font_02_sfnt_off000080ff.bin
17a1ead4d4669e8f63032807945be5319ade5d500c2a0bce332b56e99e4e6a39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FF 10644 bytes
font_03_sfnt_off0000a567.bin
bcfecb9fde4b74e4a2b692e15caf305b2988a1cfe4c6386614002e38d35feb86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA567 16168 bytes

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