Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bf00a973afd25b2…

MALICIOUS

PDF

50.7 KB Created: 2020-08-18 13:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bed0cb7b4a5cbe6c7e562cc8316d1c0 SHA-1: f5a8470e8b68ebcb12025fda6c379087b08f7d93 SHA-256: 4bf00a973afd25b2462b4e8530dc0a063e6c207faa350b817be6d4d3097862ff
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, specifically `https://ttraff.cc/pify?keyword=assassin%2527+s+creed+rogue+pc++highly+compressed`, which is presented as a download for a game. The document body, though heavily obfuscated, contains this URL and other benign-looking Shopify URLs, likely part of a link farm to improve search engine ranking for malicious content.

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=assassin%2527+s+creed+rogue+pc++highly+compressed
    • http://files.amyfaurore.com/uploads/1/3/1/3/131378776/9188164.pdf
    • http://bakosoxob.nowwhatmemphis.com/uploads/1/3/1/0/131071047/zijanazamod.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/nofewitowimeziserutoraf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7260/9686/files/91956090100.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/karedazogutosevex.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/visiting_card_design_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/62583124293.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/44475069238.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8232/files/fotopojevinezikabipabaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/manosuwexepikagomexibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/aggregate_planning_and_master_production_scheduling.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/77189277475.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/babasetaxoguvivowe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066af.bin
0fbd107afa562d1acfe967aa9fb85692a30ef7ac4d5f768a03fc21053f6b3fa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AF 5612 bytes
font_01_sfnt_off00007991.bin
dccf7797b4f0a4c6938fdf0ad1d3a7e02e8fdb713779f65d8d5130ec34e9a504		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7991 2332 bytes
font_02_sfnt_off00008422.bin
30f9f7c94e5efef4af5d71d09e73984ba44211b769ed33d2ea9af319a7970084		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8422 10548 bytes
font_03_sfnt_off0000a827.bin
967d89e51290aceb8fea09c2f9e0c707663cecf1a9b826b2128538f448fdbc28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA827 16164 bytes

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