Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f561cec72581737…

MALICIOUS

PDF

50.7 KB Created: 2020-08-24 13:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95e1b0feab8ca9df4166c0f3749929f5 SHA-1: 1df00ad8ce3877b475029557dd1a88b95e8a04ed SHA-256: 4f561cec72581737003e6c1f30bbe268e2d436fc2cd8b2e5a11199999b2a5105
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=abductor+strengthening+pdf'. This redirector likely leads to a malicious payload or phishing page. The document body, though heavily obfuscated, contains the same URL and references 'wkhtmltopdf', suggesting it was generated to appear as a legitimate document but is instead a lure. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing 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=abductor+strengthening+pdf
    • http://files.medfieldk8pto.com/uploads/1/3/0/8/130814611/wizoza_wugatigokoxos_sakuxifi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1411/0880/files/gtb_aptitude_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9078/files/canadian_visa_application_form_5257.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/texas_drivers_license_online_renewal.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/69984857501.pdf
    • https://cdn.shopify.com/s/files/1/0438/0445/9170/files/your_lie_in_april_piano_songs.pdf
    • https://cdn.shopify.com/s/files/1/0439/2982/9544/files/maternal_newborn_child_and_adolescent_health.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/ramalofosoxog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0433/7093/8533/files/8th_grade_algebra_1_textbook.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/
    • https://cdn.shopify.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000894e.bin
170ff073951636ccae0f753a156db8db9ee7750b9c3ebcd496c0e44de974a40a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x894E 5304 bytes
font_01_sfnt_off00009b47.bin
f9bbff31225182bb38a42e1d46d1846bd2be3aa38179b33afea16de0fea2349b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B47 10236 bytes

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