Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e241373762e1989…

MALICIOUS

PDF

42.5 KB Created: 2020-08-23 06:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b894cd7293dc1c8e34c54422be71df53 SHA-1: 36a9dce9b008da2d215a8fb11a241647fe5cdb15 SHA-256: 1e241373762e198911515f8f1fce3a21aaee5b426f9fd4cc6b1f12b403073975
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high density of embedded links, with one specifically identified as a malicious redirector. The ML classifier also flagged the document with high confidence. The presence of numerous links, including those hosted on Shopify, suggests an attempt to manipulate search engine results or to distribute further malicious content. The primary malicious IOC is the ttraff.com redirector URL.

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=upbolters+new+font+free
    • http://tetabuv.apexproductiongroup.co.uk/uploads/1/3/0/8/130874197/5670302.pdf
    • http://files.epworthumclouisville.com/uploads/1/3/1/4/131453713/9020568.pdf
    • http://files.oliviersbreads.com/uploads/1/3/0/8/130813988/2ac932c8669cf05.pdf
    • https://cdn.shopify.com/s/files/1/0432/2276/1635/files/kidezakenusijunibugebor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3895/files/14634617588.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7056/files/jilakuvu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/zelajafibetepudefegoka.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/jepazigazarezisew.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1733/files/29826797886.pdf
    • https://cdn.shopify.com/s/files/1/0438/9247/4011/files/46139065082.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/fractions_worksheets_2nd_grade.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000520b.bin
22aa93fe449ef92ec01feaa82846d71b34b5d17273e77559212eeec529403335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x520B 4908 bytes
font_01_sfnt_off000062e1.bin
f8cb3e1aaa8c67a4f27ffaddf6f9c23b469e0a95e354cfadf4430ee65818b2b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E1 10864 bytes
font_02_sfnt_off0000884c.bin
2a726e4d8e078a4a4a6a0bed67b139344cab8167eb027720faf42c08020076b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884C 16120 bytes

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