Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8ffaf568b05f26…

MALICIOUS

PDF

45.0 KB Created: 2020-08-23 19:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f9b45b46c0dbb0454d1c9ee42517053 SHA-1: ee41cd4fb46d81d97900e0b986b111232f07b07a SHA-256: cf8ffaf568b05f26f413f4b41d1a7b7ffb936566101c7fef6fb5067d9cb9176b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same malicious URL and a list of other PDF links, reinforcing the link farm tactic.

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=auto+format+sql+in+sql+developer
    • http://files.redshift-consulting.com/uploads/1/3/1/1/131163969/mufulebarasebos-kepefigoxigon-rikuvali-rawajurefe.pdf
    • http://files.westernenglishsetterclub.org/uploads/1/3/1/4/131437693/2479888.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/rufogu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2761/files/movarewuzetitifuna.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/vutekurizaxope.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/99860635066.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/bosupokuluv.pdf
    • https://cdn.shopify.com/s/files/1/0436/3472/0928/files/alouette_french_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/71767846417.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/appareillage_electrique.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/alice_cooper_hey_stoopid.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/37232466833.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/16787345273.pdf
    • https://cdn.shopify.com/s/files/1/0428/1751/9772/files/14364970594.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1569/files/49710659307.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_off0000720e.bin
fb4632b3236b1a251de66ceb47d60d6dca77ef3c1a938efd866d7edc4ce463dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x720E 5364 bytes
font_01_sfnt_off0000843d.bin
307211227937eb93e4e313b97fc823b391f577fe26257c963a149144c265c13e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843D 10192 bytes

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