Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38a6078928a4c20…

MALICIOUS

PDF

42.8 KB Created: 2020-08-09 07:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d5bde27b5bd692107cb35ef38a75003 SHA-1: 6dbb2259c398f82785ce2719876e92ca9e23f33c SHA-256: c38a6078928a4c20a541e0c381f0af3174cf697abf31b55602ca5b02ae5885d6
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external resources. One critical heuristic identified a malicious redirector link, suggesting the primary purpose is to lead users to harmful content. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm.

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.cc/pify?keyword=adjectives+worksheets+for+grade+6+with+answers+pdf
    • http://files.worldwidecycles.com/uploads/1/3/2/7/132740805/zejek.pdf
    • http://files.snotogo.net/uploads/1/3/1/8/131856549/papepeb.pdf
    • http://files.jtmcreativedesigns.com/uploads/1/3/0/7/130739463/vitagetol-xakosonorijen-getesukodo-sajavizes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/43872610053.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90675932679.pdf
    • https://cdn.shopify.com/s/files/1/0437/4469/0337/files/ziviwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/38798421039.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/pitidutiwotorokifub.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/a_legacy_of_spies_john_le_carre.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/46504827866.pdf
    • https://cdn.shopify.com/s/files/1/0429/2411/4076/files/33519063636.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/pewutulekibujivof.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8671/files/parthian_coins.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_off00005c61.bin
a46a0a11da00ad1fcc7902c88c8f9286e9d1029a10f840da49cfb84236fdc940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C61 5820 bytes
font_01_sfnt_off0000704e.bin
9bf855e4295638f91524174d0320f7ed802d580211dbe3d052690988c0943fe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704E 14668 bytes

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