Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f476544a736c88…

MALICIOUS

PDF

32.3 KB Created: 2020-08-19 08:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e50ef1012505e5d94b1b1fb685a21b SHA-1: ab51c5dd19a398782196b2cac1a26ed922538b68 SHA-256: c6f476544a736c88eae7b68ce8087a2582ce6d981edffd2c889ad715d82e752e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=chhota+bheem+dj+song+free'. This URL is presented within the document body, disguised as a search result for a popular children's song, likely to trick users into clicking it. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to distribute malicious content. The primary malicious IOC is the ttraff.com redirector.

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.com/pify?keyword=chhota+bheem+dj+song+free
    • http://files.mommymouth.com/uploads/1/3/1/3/131381772/af2c5793f.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/fotumojobedemisoder.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45292738862.pdf
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/12731205508.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/53027005033.pdf
    • https://cdn.shopify.com/s/files/1/0439/0843/2027/files/rojomamobopeduxiwig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2439/files/rejagozekorure.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/92063143441.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/magixuvusebudoweme.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5871/files/westlife_flying_without_wings.pdf
    • https://cdn.shopify.com/s/files/1/0433/8329/2060/files/wajimemuzep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/nigeria_accounting_standard_board.pdf
    • https://cdn.shopify.com/s/files/1/0435/9127/0563/files/93485550494.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_off0000448d.bin
2f11a32abcb29b3bd7dffc55f86ffb7b74c7804fbe45f673c546ff171c702f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x448D 5408 bytes
font_01_sfnt_off000056d6.bin
515544417a88e32d7a69470b2f3a81d307119930d0d58cb4146273bc52c85aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D6 8820 bytes

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