Malicious PDF — malware analysis report

Static analysis result for SHA-256 40fafce79c4c890f…

MALICIOUS

PDF

36.6 KB Created: 2020-08-05 16:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e4972b04a3d976450176b02c1972285 SHA-1: b9d597e1f8adbb4501bdd68a212337f38cf27113 SHA-256: 40fafce79c4c890f79c9bd0b813577e55b84652d060ca3eefe20ccaa355f433e
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, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the redirector. The presence of numerous external links suggests a link farm or SEO poisoning tactic to distribute 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.ru/pify?keyword=present+simple+and+present+continuous+exercises+intermediate+pdf
    • http://files.artisaninc.com/uploads/1/3/1/4/131406036/2809186.pdf
    • http://files.middletennesseeflyfishing.com/uploads/1/3/1/3/131380973/fdd57229.pdf
    • http://files.punkandsissypublications.com/uploads/1/3/0/8/130815009/914c21.pdf
    • http://files.lenasboutiqueofsweets.org/uploads/1/3/1/0/131070374/2825122.pdf
    • http://files.sueattalla.com/uploads/1/3/0/8/130813846/b0fe5d5d0dc3ff.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0430/1612/6625/files/pupobopufamanu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/togitojabikakijepexotavu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/76046172895.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/32895877372.pdf
    • https://cdn.shopify.com/s/files/1/0435/6076/3555/files/97181880093.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/xedarifim.pdf
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/22005541892.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/70618817113.pdf
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/pressure_points_in_human_body_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/bulthaup_b3_katalog.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_off000050c0.bin
748337be624e979e9807e0118624c1f0ac56e23ae9b45ed41a3512fbad246505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50C0 5372 bytes
font_01_sfnt_off000062ef.bin
76daa48edd6ac63d4d57cfd66b99982f731a7609b634735e0ad78fbbf2672d5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EF 9956 bytes

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