Malicious PDF — malware analysis report

Static analysis result for SHA-256 e456e512f60b9527…

MALICIOUS

PDF

35.7 KB Created: 2020-08-24 05:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b36b3798aed4fb7fa118e22fca9d15e2 SHA-1: 46ee34edf305086d4038d8eebf86866f12a1375a SHA-256: e456e512f60b952786a05fb3293c6a469e1d499d50a56392d48a38a8dc06fb3b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=wallpaper+animasi+lucu', which is flagged as malicious. The presence of numerous links to Shopify domains, alongside the malicious redirector, suggests a link farm or SEO manipulation tactic, potentially leading to further malicious content.

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=wallpaper+animasi+lucu
    • http://files.prairieskyschool.net/uploads/1/3/0/8/130874381/9731427.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/fobizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/continuous_femoral_nerve_block_ultrasound_guided.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3418/files/waxituluzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5719/2853/files/nugugagarikewiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/77703675343.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/32855806450.pdf
    • https://cdn.shopify.com/s/files/1/0460/3799/1588/files/32025977773.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/ptcb_study_guide_2015.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/little_more_video_chris.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/greg_kihn_songs.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_off00005080.bin
df06f029f128c42813172aea72377f1a0177694d898c3a2581d390674a83cff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5080 5092 bytes
font_01_sfnt_off000061ba.bin
42d30e65c0ae6a654084011cd3c98efec8bbbf9a1b6ba324703c5ccc72578079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BA 9612 bytes

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