Malicious PDF — malware analysis report

Static analysis result for SHA-256 4adcec3c7fb7725c…

MALICIOUS

PDF

45.3 KB Created: 2020-08-11 22:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b674b83d80384772002e2820bd51bb1 SHA-1: 08793ec69fe8ab33e58c8538a39ca750de8d38b7 SHA-256: 4adcec3c7fb7725c5eca78f37ac5738acba144d5dc0bf1c4bfb07e42bc2dc8d6
150 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDF files, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to click on the malicious redirector URL, which likely leads to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=buffon+histoire+naturelle+pdf
    • http://files.myoffgridpower.com/uploads/1/3/0/8/130874063/5096bb7f8886.pdf
    • http://files.poetrypainting.com/uploads/1/3/0/8/130813428/3363917.pdf
    • http://nedifuli.amymaddoxphotography.com/uploads/1/3/1/4/131406258/tikadidegoleboxotov.pdf
    • http://lazawigo.cassidysparks.com/uploads/1/3/0/7/130775162/c85dd21f94b30.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89853177043.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/blossoms_of_the_savanna.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2014/files/simiful.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/biology_a_level_revision_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0049/5260/files/batajezorumirudaxifog.pdf
    • https://cdn.shopify.com/s/files/1/0440/7567/9896/files/26301732060.pdf
    • https://cdn.shopify.com/s/files/1/0431/0954/8188/files/29986334799.pdf
    • https://cdn.shopify.com/s/files/1/0436/8846/0441/files/lupudiruriju.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/rumopaborijigawabepanas.pdf
    • https://cdn.shopify.com/s/files/1/0439/8986/0510/files/scheme_of_work.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/mukitonama.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/sazulo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f0e.bin
270f0b1e31900677f121ef48e578796efcafcecb4c1238eacefe6e12cc44d1b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0E 5180 bytes
font_01_sfnt_off000080a3.bin
11f7c1499aa25bd04a279ec3dbb23d8e7f530b1271b038a61454374cba21d0c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A3 12004 bytes

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