Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b163930bd061a12…

MALICIOUS

PDF

52.3 KB Created: 2020-10-28 23:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2e469dd137de74fb7c8acb891ed44d6 SHA-1: d568704540225e7da5c55693045839f38c70738f SHA-256: 2b163930bd061a12f728f599b4cd35ca9ac97871d9b7a33d857792049086d7ba
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying one as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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://cctraff.ru/aws?keyword=learn+italian+pdf
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f8a89c38375d.pdf
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f881e5d7bd14.pdf
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f8ffe6c12122.pdf
    • https://doxeduzawixufak.weebly.com/uploads/1/3/4/3/134383044/6575759.pdf
    • https://cdn-cms.f-static.net/uploads/4413567/normal_5f973500d2126.pdf
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f908a72b1786.pdf
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/5327628.pdf
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f8bc557175ef.pdf
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f94c3377aadb.pdf
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/65100f.pdf
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/7965169.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6631/7205/files/tewunalikomiwibipowel.pdf
    • https://cdn.shopify.com/s/files/1/0483/5478/7477/files/unverferth_1225_rolling_harrow_manual.pdf
    • https://s3.amazonaws.com/leguvefu/68387837790.pdf
    • https://cdn.shopify.com/s/files/1/0498/0273/9866/files/50031723004.pdf
    • https://s3.amazonaws.com/bizamesuwepe/93141081376.pdf
    • https://s3.amazonaws.com/mulerux/binovefusuj.pdf
    • https://s3.amazonaws.com/gagagakigibapo/98973628538.pdf
    • https://cdn.shopify.com/s/files/1/0483/8873/5125/files/trumpet_music_theory.pdf
    • https://s3.amazonaws.com/zetare/lobamegoka.pdf
    • https://s3.amazonaws.com/fapaga/10241841120.pdf
    • https://s3.amazonaws.com/subud/820376172.pdf
    • https://s3.amazonaws.com/pazifetanegapu/8667774671.pdf
    • https://cdn.shopify.com/s/files/1/0437/4632/8737/files/rise_of_the_kings_apk_download.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2dc.bin
6a8a6d968442886a6ebd758cdcacb46aa315442d856fcd3e4869d0f3d77ea7c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DC 4800 bytes