Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b31d96728b9214d…

MALICIOUS

PDF

46.7 KB Created: 2020-08-07 00:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fdb477bceae5913bbbdb1b953713158 SHA-1: a8b517c1d79e07c23f88049061ec934c10300b7b SHA-256: 3b31d96728b9214d71296f78dc59cd68a88da43688807d003c5eedab36431ee5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, forming a link farm. One of the primary links directs to a known malicious redirector at 'https://ttraff.ru/pify?keyword=posthuman+board+game+rules+pdf'. This suggests the document is designed to lead users to malicious sites under the guise of providing game rules. No scripts were extracted, and the document body was heavily obfuscated.

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=posthuman+board+game+rules+pdf
    • http://files.littleegyptlyceum.com/uploads/1/3/1/3/131380627/29fde3e09.pdf
    • http://files.powtronicstech.com/uploads/1/3/1/1/131163691/jelusinav-sifuvure-sefeweluk.pdf
    • http://files.elizabethrona.com/uploads/1/3/0/7/130739918/dosilupafulevajidew.pdf
    • http://files.wyalusing.net/uploads/1/3/1/8/131871466/2d493ea145e.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/the_broken_wings_kahlil_gibran.pdf
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/xajog.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/tipamukutipujozeroles.pdf
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/jowomarekasi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1353/7951/files/13362664935.pdf
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/budanivamomip.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/70643522345.pdf
    • https://cdn.shopify.com/s/files/1/0433/6762/8950/files/86176808108.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/briggs_and_stratton_5500_watt_generator.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/pmp_exam_prep_questions_answers_explanations.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_off000078d4.bin
5639c3aefc1b75611be695f4ad502bd4b39b7b04f530758254ca7f7db456497c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D4 5596 bytes
font_01_sfnt_off00008ba7.bin
5b4a929f000b80a4462d47ff0dfcab9006e31f4274872c08d91c327605b2c9a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA7 9916 bytes

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