Malicious PDF — malware analysis report

Static analysis result for SHA-256 f905d2555c4c2019…

MALICIOUS

PDF

56.0 KB Created: 2020-08-31 09:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0f75973a8eda457c3e99419f36d83a5 SHA-1: 3ea1ef9d9956b7d347346a6883d26182fdd033f7 SHA-256: f905d2555c4c20192740deaba93b263952e759102290a831ac629325991ec752
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, likely as part of a phishing or scam campaign. The document body, though heavily obfuscated, contains text related to network hardware and the malicious URL. The presence of a malicious redirector link and the ML classifier firing strongly indicate malicious intent.

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.ru/wix?keyword=access+point+tp-link+pharos+cpe210
    • https://static.usrfiles.com/ugd/08fe48_043aebed183b4f9d9ab4be4c0108d353.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_664abc8f64d14eb691b7b96c415b3005.pdf
    • https://static.usrfiles.com/ugd/b8c837_d00699e14d084271a2a4c8d3ad75c5f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d974b2306f6b4da9a81170ed331ec1c0.pdf
    • https://static.usrfiles.com/ugd/accd1f_1b42b5d5a8894fd68cb1a508619ad43c.pdf
    • https://cdn.shopify.com/s/files/1/0437/4475/5866/files/72767726518.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8311/files/livros_sobre_pnl_em.pdf
    • https://cdn.shopify.com/s/files/1/0454/3217/6808/files/wotojovoraz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/3._5_arms_and_equipment_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/61492744141.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/kinukaziv.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/fuzalok.pdf
    • https://static.usrfiles.com/ugd/b8c837_c642ab95ce4f461a8a52c654fe649325.pdf
    • https://static.usrfiles.com/ugd/b8c837_92bea7a586fd4e00a08e629d2fab10a1.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_bb3eb600906c4ac3b0f75b76364c2f4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4ad0c5470d84547a3b459b64627caf4.pdf
    • https://static.usrfiles.com/ugd/469aea_5d760c5f40d34c9d8bb0d7d72114f053.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_off000096e2.bin
3fa576a317aac26c1f86cc88364d0245db7ac332d4148c67c500dc8c4a9f4e56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E2 5432 bytes
font_01_sfnt_off0000a950.bin
4f3eafb452860b45e26c52366b98fb2550d18523f130d317a3d0769cf2964e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA950 13084 bytes

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