Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1abb2f82e305ab6…

MALICIOUS

PDF

47.4 KB Created: 2020-08-05 01:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4afeab8ba7eccbec845fcb6847194bf2 SHA-1: 7bc33e76139b92096e681dcce3ca6ef70b752c32 SHA-256: d1abb2f82e305ab6d9b99c4983ebef74956594fe53f20b2797ce2d56f1623111
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the string 'Bsc biology syllabus pdf', suggesting a lure to entice users to click the malicious link. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=bsc+biology+syllabus+pdf
    • http://files.tlswindsled.com/uploads/1/3/0/7/130740127/2549550.pdf
    • http://files.thecontactlensmuseum.org/uploads/1/3/2/6/132682171/defubexezidujis.pdf
    • http://numaseti.ljhfoc.com/uploads/1/3/1/3/131383791/nowipurusamoje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/70599489638.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/15598410029.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/93212150221.pdf
    • https://cdn.shopify.com/s/files/1/0428/3400/2086/files/7140408782.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1735/files/basefebun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93616534700.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/60463060325.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/15276526651.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/nj_6_points_of_id.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/xewepagituvukeba.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/wavobulovozazido.pdf
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/90241880720.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_off00006f5e.bin
6649c9be844a55003bdfe297303ec5916f25958eb586b4ecf55e21b0b993c058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5E 5520 bytes
font_01_sfnt_off00008242.bin
e5137a0f8ec91704420da53959e02ade9a4e9895ce165f4c7c0e0bc59b7d557b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8242 15128 bytes

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