Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b6b5b0909c1fb9…

MALICIOUS

PDF

43.4 KB Created: 2020-08-20 08:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90d40003666a088f0d53e716306a16eb SHA-1: ffff353534d9f7fe3f7b652f0073a4a41ae52d2d SHA-256: 76b6b5b0909c1fb94effe6fa874db1c3fe68e8ed31e0dfe97ecab9540a098073
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as a weather report, to a known malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=weather+report+in+english+newspaper, which is likely used to funnel victims to a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the malicious redirector and the link farm heuristic strongly indicate a malicious intent.

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=weather+report+in+english+newspaper
    • http://files.cardinaleashtanga.com/uploads/1/3/1/4/131438658/8e795fa45e962.pdf
    • http://files.blogg.allegro-as.no/uploads/1/3/0/8/130813644/8995501.pdf
    • http://files.afrikankulcha.com/uploads/1/3/0/7/130739238/6430871.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/the_legacy_of_isaiah_berlin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/cahier_journal_cp.pdf
    • https://cdn.shopify.com/s/files/1/0456/5244/3303/files/sharp_aquos_42_inch_lcd_tv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/garena_plus_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8036/7780/files/nakixejokilajuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0700/files/33966907219.pdf
    • https://cdn.shopify.com/s/files/1/0439/4188/8155/files/13639937191.pdf
    • https://cdn.shopify.com/s/files/1/0433/7952/3751/files/frigidaire_gallery_dishwasher_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/xudirujudonokesemajalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/sumaxabupag.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/ring_doorbell_pro_install_guide.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_off0000631c.bin
ba6d637d361030f80443d2e14303af7fa993c4e36eae54cedd63988c93b91bfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631C 5188 bytes
font_01_sfnt_off000074d6.bin
684fa8992c5075dcac2893000f5d1dbe16edb5b89b4ceb6759a2fead1dbf918f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D6 14112 bytes

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