Malicious PDF — malware analysis report

Static analysis result for SHA-256 91fe792bee2b2bad…

MALICIOUS

PDF

32.8 KB Created: 2020-08-15 16:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e503bc2971b307938995351e7c805aa SHA-1: 4d0e6a549123d2424d49b930b42bc5c4359734b2 SHA-256: 91fe792bee2b2badb5cc1a7b8dad6bb404165f772c797ed6b754c6b98c798c3e
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary link directing to a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to manipulate search engine rankings or distribute malicious content. The document body itself is heavily obfuscated and contains a URL that appears to be part of the 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.com/pify?keyword=ugandan+gospel+songs+2018
    • http://files.amberbellemusic.us/uploads/1/3/0/8/130873944/sakoninan.pdf
    • http://bexijadu.sundancecrs.com/uploads/1/3/1/1/131164250/9740916.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8986/files/14648796319.pdf
    • https://cdn.shopify.com/s/files/1/0435/3628/5860/files/42652309454.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/pavonup.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/automatic_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/skills_practice_scientific_notation_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3651/files/70460175003.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/8182654477.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/wadutadig.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/64108465544.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/jifitesazunowar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/4089563692.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/bokovokavupazasupinuza.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_off000045a4.bin
dddad3aeaff40a00ed240b79c3f879a45e7da386acfd0662711ef1db8ffe1f5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45A4 5544 bytes
font_01_sfnt_off00005895.bin
6bc6e47a1d766ddaa18b0ef14bbd1fde428dd94fd2547212b98a9b1592a37917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5895 8804 bytes

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