Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a431399db239e9…

MALICIOUS

PDF

35.0 KB Created: 2020-08-11 16:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b334fd2623631e39f969ee2e38eed476 SHA-1: 93dd16128ade029312e9828a54d601b83618c6b9 SHA-256: b2a431399db239e9535a3187b09f28e9c6f3d258b420b1a1971e7ae78577e772
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to external PDFs hosted on Shopify. The primary malicious link is designed to appear as a catalogue, likely as a lure to encourage clicks. The ML classifier also strongly indicated maliciousness.

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=catalogue+nsx+schneider+pdf
    • http://files.sincerelyalana.org/uploads/1/3/1/6/131636766/zadebogonidavaluk.pdf
    • http://files.holisticways.com.au/uploads/1/3/0/7/130775506/budotirewet.pdf
    • http://files.sdusdape.com/uploads/1/3/0/7/130776276/2809571.pdf
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/css_the_definitive_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/sefesijogaverelomokawaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/63508957843.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/31067201915.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/i_am_jazz_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90262961418.pdf
    • https://cdn.shopify.com/s/files/1/0436/0539/3571/files/xifok.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/katakoxomitelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5278/5055/files/togosor.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7384/files/zoxisotebifewabujewoze.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/gawoluzikilorupumuwuguzip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/53688546468.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/73896596612.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_off00004a03.bin
9036028019c30a994c875e8577926ddeaf06863b9eae1ac3ccf61fc5fcf2f344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A03 5392 bytes
font_01_sfnt_off00005c5b.bin
a0d3205ca97c9e708a5133e477d098ab7c15a6c0e64be0476f81a242484f23a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5B 9912 bytes

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