Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a73141937bad2a…

MALICIOUS

PDF

56.3 KB Created: 2020-08-19 02:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07b0decddfb6eb89da5323e2dada0634 SHA-1: d91da2024af0393aff36756e9b972d1eefdfca27 SHA-256: c2a73141937bad2ac4c18a2f6c298ca4b265e79da093949d43af8b375ae1a3e3
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to a redirector service (ttraff.com) and a link farm hosted on Shopify. This indicates a likely attempt to lure users to malicious websites. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the link farm and redirector are sufficient indicators of malicious intent.

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.com/pify?keyword=deidre+mengedoht+reporter
    • http://kobowugir.gregb-design.com/uploads/1/3/0/8/130814328/pizavo.pdf
    • http://gopulofu.vancityscrapcarremoval.com/uploads/1/3/1/1/131164250/vowizufesob-simixufenawup-juriteta-mulufolagewofod.pdf
    • http://vidodubuk.higherexpectationframework.com/uploads/1/3/2/7/132741194/8817162.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/wugemanojo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0763/9711/files/18008909809.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/80505533379.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9561/files/20109423757.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/xumukojebagudoxonibi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8151/3625/files/amigdalas_palatinas_anatomia.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/shakespeare_plays_in_order_of_performance.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6056/files/biri_biri_by_king_saha_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0450/9813/9813/files/kawija.pdf
    • https://cdn.shopify.com/s/files/1/0429/0438/7750/files/benny_andersson_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/zevodemefepisediw.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061eb.bin
debe8ad5abebf52379c61823c108d3fb836862d1a1a29266e28ee2b91ddfe1c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EB 3976 bytes
font_01_sfnt_off00007029.bin
46a0d2ca10cee6ceaf1246ccb8ee111d3e28cca99a99a4c80a083abcbb5ba649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7029 4952 bytes
font_02_sfnt_off000080ca.bin
fa836470b372d4c002ef8114088cca77ed9eb1608b18e3547acf174aed6e4b89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80CA 2016 bytes
font_03_sfnt_off00008a2f.bin
0a8a72d001bffa26912f082cc23356879708ac96ffe7a87af6e2f0574d96ea4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2F 10812 bytes
font_04_sfnt_off0000af53.bin
ae534ac88996215c963a78aeb32ed9384dc8ea50475975f029e54da0b9a05bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF53 16076 bytes
font_05_sfnt_off0000c3fd.bin
932ed85a93102613222519320e5b03ff0820c7c853bb4feb7922ef9cc8ec1c18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FD 6104 bytes

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