Malicious PDF — malware analysis report

Static analysis result for SHA-256 886bcd406549a48b…

MALICIOUS

PDF

44.8 KB Created: 2020-07-24 18:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0983af2aee54c7cd08f848890a3c373 SHA-1: 27fc89106b44f4ec974f855027061c0c1a2baba3 SHA-256: 886bcd406549a48bfc8e592a63a32dcc067833056f52decefa0f562f40233645
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 'ttraff.com'. This URL is likely used to redirect users to a malicious site, disguised as a Microsoft Access datasheet. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination. The ML classifier strongly supports the malicious verdict.

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=datasheet+view+microsoft+access
    • http://files.gradgov.com/uploads/1/3/0/9/130969645/ratudipat.pdf
    • http://files.guldbrikken.dk/uploads/1/3/1/4/131437225/pesumo_jiwonedo_nezukudomal.pdf
    • http://files.laughingbuddharetreats.com/uploads/1/3/0/7/130739269/kosoxefixosakujelox.pdf
    • http://files.litterpreventionprogram.com/uploads/1/3/1/3/131398251/9082214.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19441108854.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/lurila.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/5046109119.pdf
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/zilarapurax.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/12479079731.pdf
    • https://cdn.shopify.com/s/files/1/0435/1374/1472/files/vixuzukoporisojapaxak.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/49435537253.pdf
    • https://cdn.shopify.com/s/files/1/0428/6208/4262/files/bifirigedasuwivoxukujuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/vodejaxemapatog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/23144813537.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/3455194585.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_off00006c41.bin
f39034bac356b3d8c94d72fd612037da68616203065297593bdb5515315be05d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C41 4924 bytes
font_01_sfnt_off00007d12.bin
a9d03afd57313ec249daadabcf125148c20f2c018ee4e2a8d76f00ce8b922068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D12 15700 bytes

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