Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e49b5f387167b3…

MALICIOUS

PDF

62.5 KB Created: 2020-08-06 20:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e8ccc752e525a3263e0cc967e27d732 SHA-1: abeaf35995c1c1b1a0a8229f9da876d7407f4445 SHA-256: b9e49b5f387167b39da02ff0581deb7af886a8d712a1140984f59ba329f8a41c
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though partially corrupted, contains text related to learning to draw and mentions the wkhtmltopdf tool, suggesting a lure to potentially malicious content disguised as educational material. The primary malicious IOC is the redirector URL.

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=aprenda+a+desenhar+pessoas+guia+completo+pdf
    • http://files.inspirednourishment.ca/uploads/1/3/1/6/131607062/josudabe-levaziwise-saronalasak.pdf
    • http://files.michael-corey.com/uploads/1/3/0/7/130739835/fce5f6a1e7.pdf
    • http://files.semisrc.org/uploads/1/3/0/7/130740536/945cb744fa6.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/my_way_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/texaxesokowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8304/files/buwevowawigo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/kuvepit.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/kotiravuzerefagilenofuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/4320/9895/files/53321901719.pdf
    • https://cdn.shopify.com/s/files/1/0432/0300/2523/files/89101354139.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1393/files/zidel.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/36521280383.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/banijuw.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_off0000b27b.bin
d36954717257900a9ddf204c66935c3cbc5fe732c2f144ab8be5ced63ccacb09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB27B 5556 bytes
font_01_sfnt_off0000c538.bin
fae8f229dc4930d4183035ec100a1c763eb5df2ccd1b5e4b117f867da9ac5911		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC538 13596 bytes

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