Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1468cb2b94ef87a…

MALICIOUS

PDF

56.3 KB Created: 2020-08-06 03:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e620ddfaed1a60e095cf80829e3be3a0 SHA-1: e6e7c1736b1f8d83e90f80149637d75a4dfe7482 SHA-256: a1468cb2b94ef87acda09dbb6f12287b955bb7cc0f1514d7f2732287f0f08b91
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. The primary malicious indicator is the link to 'ttraff.cc', a known malicious redirector. This suggests the document is designed to drive traffic to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

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=architectural+design+elements+pdf
    • http://files.billiamscafe.com/uploads/1/3/2/6/132696598/5886895.pdf
    • http://files.truestthreads.com/uploads/1/3/0/9/130969710/b37ae2a192477b.pdf
    • http://tilariwaf.momentsbyannephotography.com/uploads/1/3/2/6/132695384/tasimajawize-xemozuvakor-sovumepul-mofiforafusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6573/7370/files/mapetolutajefuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/jinejazuxivokuximet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/bulk_resize_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/feterobugawimizejiwet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2781/5833/files/lukesexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6974/2999/files/juwudowarino.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/16935996302.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/wosanura.pdf
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/86564324205.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/na_step_working_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/7131213321.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/xurovijolel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009225.bin
585bd672e866111f7db584d4b664bdc6771cb37f84c49838c68ce675a8cce88c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9225 5328 bytes
font_01_sfnt_off0000a412.bin
cafea489409cb834bec21634e5b39a0640a4d7dc735b94761d64db50764e3fe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA412 9940 bytes
font_02_sfnt_off0000c61c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC61C 4324 bytes

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