Malicious PDF — malware analysis report

Static analysis result for SHA-256 661f2eebf5b8b202…

MALICIOUS

PDF

40.7 KB Created: 2020-10-29 15:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0bce1ff40f82d7e21d7b23e32ccb52b SHA-1: 9a4c245c57070ac01b3ccd23ca16c41d962105a9 SHA-256: 661f2eebf5b8b20203ed95056ebb1c26b9c3f998b9c331fb2a97e9e643b6f0b8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. This suggests the document is part of a link farm or phishing campaign designed to drive traffic to malicious sites. No scripts were extracted, and the document body is heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?keyword=11%252F8%252F16+release+date
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/mixerosir_werotunezetitov_jenonezakali_mojodadi.pdf
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/zitanuzesuzovigakew.pdf
    • https://mevamakokuvafas.weebly.com/uploads/1/3/4/0/134040887/7daef07145c0df.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1d44b872.pdf
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/1763158.pdf
    • https://ragidogatekanex.weebly.com/uploads/1/3/4/3/134388076/xosopuw.pdf
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/7378932.pdf
    • https://bikojeril.weebly.com/uploads/1/3/3/9/133999271/2902165.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0479/4276/2663/files/sejisupatukelimiteve.pdf
    • https://uploads.strikinglycdn.com/files/820f3777-3e1e-4399-9d21-3fd7a62dabfd/47509451765.pdf
    • https://uploads.strikinglycdn.com/files/2a60c69b-c405-4ab8-a690-e8700a603675/sarepud.pdf
    • https://uploads.strikinglycdn.com/files/e7a2fa26-b807-4579-9232-debd7c8c3e93/bokiraxalexi.pdf
    • https://uploads.strikinglycdn.com/files/fc0a6828-d0a5-4540-9ad6-ad19126c1a7c/sidutumijezovezes.pdf
    • https://uploads.strikinglycdn.com/files/c18aeed5-5a67-4fa7-b866-49ba97cf9718/8216139638.pdf
    • https://uploads.strikinglycdn.com/files/7156fb80-06c2-4e73-ba39-ec9f13a83587/66477952534.pdf
    • https://cdn.shopify.com/s/files/1/0503/3630/1219/files/57948647711.pdf
    • https://uploads.strikinglycdn.com/files/392b1c1d-71eb-4480-b56d-471f92dd0378/sozevonigigudatar.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000735e.bin
5b7ada3f65679395089deeedbc6820bcbe0b45d430293c9364f218ab40d2b452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735E 4684 bytes
font_01_sfnt_off0000834b.bin
8c08a67fa9346e84faf0a9ec254e9712d74368604542279fe6b46f6215468ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x834B 10892 bytes

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