Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9e985681216497…

MALICIOUS

PDF

50.7 KB Created: 2020-07-20 03:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89720731054de39324acc284c7f3d219 SHA-1: 71af9c98298c326b06bf4f18912a322545149f7e SHA-256: bf9e985681216497e38bfb748b056c98f85e6ea6c9310cb945608a612e2c5b7f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a mass of external links, a technique often used for SEO poisoning to drive traffic to malicious sites. One of the embedded URLs, 'https://ttraff.ru/wb?keyword=fibrilacion%20ventricular%20pdf%202016', is flagged as a known malicious redirector. The document body is heavily obfuscated and appears to be corrupted, preventing a deeper analysis of its specific content or intent beyond the link farm.

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/wb?keyword=fibrilacion%20ventricular%20pdf%202016
    • http://files.olamaufarms.com/uploads/1/3/2/3/132302883/ramukonosurogi.pdf
    • http://files.gbyws.org/uploads/1/3/1/4/131483019/paludizixi-pazibokadelok-xovubonavegazuz-nobuxudisapefod.pdf
    • http://files.gregoryebarnes.com/uploads/1/3/0/8/130814340/f8ab450bbd4e.pdf
    • https://labupuli.files.wordpress.c
    • https://cdn.shopify.com/s/files/1/0433/5032/7454/files/bobujedenovevotagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/zimulatobutetuwixuloxuti.pdf
    • https://mafameruvot.files.wordpress.com/2020/06/23143930453.pdf
    • https://labupuli.files.wordpress.com/2020/07/kufekesuzazawaxojobum.pdf
    • https://zabalojiji.files.wordpress.com/2020/07/paxizoxizopojaja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/maruzuvigewebejukotu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/birafelilapixaselimaveg.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/82504026289.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/madevidobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/92399048871.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/godimovim.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_off0000875c.bin
dede3948d9bcf1b9e273b4e858fa0f844fe8e198abcf8e5cae518d33faeab246
pdf-font-stream PDF embedded font (sfnt) at offset 0x875C 5488 bytes
font_01_sfnt_off00009a0f.bin
7d1f0c6d6cf823972f97e1ad3ec3099e2303df2b2eb0d7c5918b36e3eedb3ce0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0F 10448 bytes