Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde3239140925e7a…

MALICIOUS

PDF

41.1 KB Created: 2020-08-28 00:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5160b18069c5d5a0029f5461c9543f80 SHA-1: d850a392fa8930b586b4376565aa46e28094f83e SHA-256: bde3239140925e7a8903ce13ee520f0501cf8566de712a4af364764ec6445ce0
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The primary purpose appears to be to lure users into clicking malicious links, likely for further exploitation or credential harvesting.

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=gurps+transhuman+space+pdf
    • http://files.carlinvillefire.com/uploads/1/3/1/4/131483361/f57fc2f.pdf
    • https://cdn.shopify.com/s/files/1/0428/7302/8775/files/mofikufimibegijir.pdf
    • https://cdn.shopify.com/s/files/1/0438/9080/2856/files/pifijugezojuparenadarodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/30795486862.pdf
    • https://cdn.shopify.com/s/files/1/0437/5891/1649/files/complete_key_for_schools_2020.pdf
    • https://cdn.shopify.com/s/files/1/0453/9108/5736/files/90894718172.pdf
    • https://cdn.shopify.com/s/files/1/0437/9515/3058/files/acuerdos_de_paz_en_el_mundo.pdf
    • https://cdn.shopify.com/s/files/1/0463/0698/4098/files/anestesia_local_regional_y_general.pdf
    • https://cdn.shopify.com/s/files/1/0459/8677/5197/files/jukixikovemovunowa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/49598296690.pdf
    • https://cdn.shopify.com/s/files/1/0449/8967/7736/files/anlage_sv.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_off00006369.bin
cd0bd653d0043f065b9e253d5a6f71fdcad7559cafe46bb246cff187dea85155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 5392 bytes
font_01_sfnt_off00007592.bin
8500f2c9cc6eeb518313390e5799cfc87c663eaada3036d241fdeeef6198af7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7592 10076 bytes

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