Malicious PDF — malware analysis report

Static analysis result for SHA-256 34cf9597d2577db8…

MALICIOUS

PDF

49.3 KB Created: 2020-08-04 00:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dc5f64f398522a9a803d63128448e48 SHA-1: 5c8c15e79f006ef29d658865f9d631167e59bf23 SHA-256: 34cf9597d2577db8f88af94a248f5b710800453e63e71007cdd7c078ed2e9282
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service. The primary heuristic indicates a malicious redirector link to 'ttraff.ru', which is likely used to funnel victims to malicious sites. The document body, though heavily obfuscated, also contains the same malicious URL, reinforcing the attack pattern.

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.ru/pify?keyword=walden+thoreau+pdf+gratis
    • http://files.artistonabike.co.uk/uploads/1/3/1/0/131070458/192754.pdf
    • http://files.trattoria89.com/uploads/1/3/2/7/132740362/rodezimedizoret_wopulod_wivos_wularuxev.pdf
    • http://files.darylgove.com/uploads/1/3/2/8/132816165/1972985.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/jedenalokonilewoguxalib.pdf
    • https://cdn.shopify.com/s/files/1/0438/2559/4530/files/76346480355.pdf
    • https://cdn.shopify.com/s/files/1/0428/3901/5580/files/ledijajupiwenutifasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/lirapivafilil.pdf
    • https://cdn.shopify.com/s/files/1/0440/6955/2293/files/katomofujojukiwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/96911435503.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/visaboxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4505/9749/files/15382997089.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/nodelokopimufepuvu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/56579210938.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/sepusuzaworunanubuxizam.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_off00008378.bin
994c3625c04f765bd2cc9d4de47cd65d6b58db2e3bc30a0dd34d720dfbd636ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8378 5316 bytes
font_01_sfnt_off00009596.bin
ccd94d5d86be01ddb441ad092a243392eda66331fb8d076ab379d477cd93683b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9596 10208 bytes

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