Malicious PDF — malware analysis report

Static analysis result for SHA-256 4195eafa9d676323…

MALICIOUS

PDF

54.5 KB Created: 2020-08-04 18:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a838ef8e9f7611da0ca3ad0c13cd59e SHA-1: 8961a8205b19a2c16d176b37f9e0ee796b2118bd SHA-256: 4195eafa9d67632337b483a8d4e3138302ec3b54f3a7f4c6389fb140f8cc5bb4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=temporal+difference+learning+pdf', which likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, contains this URL and another benign-looking Shopify URL, suggesting a lure to a malicious site. No scripts were extracted, but the PDF structure and link farm indicate a social engineering attempt.

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.cc/pify?keyword=temporal+difference+learning+pdf
    • http://files.elizabethaknox.com/uploads/1/3/0/8/130873717/6728640.pdf
    • http://files.catherinewhitaker.com/uploads/1/3/2/7/132710627/zanotefug.pdf
    • http://files.vodousorcerer.com/uploads/1/3/2/6/132680915/kaziw-xilegitubeku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41697505155.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/18524779206.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/jizeluni.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/62977545959.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/the_walking_dead_s06e04_kickass.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/danowode.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/pekijilamolofibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/8487807211.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/magatuzadibufexetisakopix.pdf
    • https://cdn.shopify.com/s/files/1/0439/8628/8798/files/xumuwutakinude.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/62439094581.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/zeweritekowinujavupuv.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_off00009115.bin
82c503ac3ddecc4e9d4a9482a85826d405f0a20417ee1e03775e8661f71a995a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9115 5244 bytes
font_01_sfnt_off0000a2d7.bin
1b8bd187c6cd28865297dd2ed2bc12b2de367fc8319978072ba410199e323aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D7 13240 bytes

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