Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf020d56434a2ef…

MALICIOUS

PDF

50.1 KB Created: 2020-08-23 01:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b90f0804f09021fcefe155bbfaf7fe6b SHA-1: 6e36db06d968651f1f0468969b34a8fe453b60c4 SHA-256: cbf020d56434a2efedb629319bc14532505f48daf4b939add76f9989360c4903
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=aciclovir+dosis+herpes+labial+pdf'. This indicates a social engineering lure, likely to deliver malware or phishing content. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=aciclovir+dosis+herpes+labial+pdf
    • http://kibezixon.mzsacredhealing.com/uploads/1/3/1/4/131453872/5855726.pdf
    • http://files.thedollhousellc.com/uploads/1/3/1/3/131381602/2034825.pdf
    • http://files.boyrazak.com/uploads/1/3/1/3/131379552/d9a2d298373c3f.pdf
    • http://files.annaschneiderdesigns.com/uploads/1/3/0/7/130776368/8637f35c4a5e.pdf
    • http://files.moveovermsa.org/uploads/1/3/1/4/131483249/lubekaku.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/31044079910.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/tafelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/paxanofarewobaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/binezuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/62557174892.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/building_materials_and_construction_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/98810140653.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/tafojejubirekaraw.pdf
    • https://cdn.shopify.com/s/files/1/0438/0321/3984/files/el_casarse_pronto_y_mal_larra.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/kegilikixivakosugane.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/76398179877.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_off00008648.bin
b9ead330954c6eb460ec0d7097e05b867a5b31a6c27507bc375d9db057c9e92a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8648 5432 bytes
font_01_sfnt_off000098b4.bin
231ada5df97411042f565b278cca6630f45e5e97ec6c55f189d667f452965d4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98B4 10496 bytes

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