Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3668bf4db37043…

MALICIOUS

PDF

40.8 KB Created: 2020-08-26 07:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e29b3945357b75daeca7ba943e44036 SHA-1: 0a6054dca27d9f638da556b42868e5d155638662 SHA-256: 8c3668bf4db37043ef9b52ea55888b86a8631f3a3d1983794d44165ad6b0e3f9
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, a technique often used to create SEO link farms. One of these links, 'https://ttraff.com/pify?keyword=norma+oficial+mexicana+nom-059-ssa1-2015+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious sites.

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=norma+oficial+mexicana+nom-059-ssa1-2015+pdf
    • http://files.mcconservation.org/uploads/1/3/1/4/131438245/5845220.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/zoveremujezaruvama.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/51279031641.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/tuwovefujibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4337/3735/files/71110324863.pdf
    • https://cdn.shopify.com/s/files/1/0433/4505/1797/files/pernicious_anemia_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3785/files/karan_arjun_film_hd.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/hate_being_sober_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/fullmetal_alchemist_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/jerafudofuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/1977/1799/files/jexinabogunabofare.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_off00005f5c.bin
cb1891af53365a168397af06d9d978741ba5ab7f5dfcc198042a812e09cebc3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5C 5976 bytes
font_01_sfnt_off000073aa.bin
609a237f1131cb5d656628286bdd03700d1f5a64be57e2bd54f87245b3226459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AA 10200 bytes

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