Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8d7e37134fc4af…

MALICIOUS

PDF

47.6 KB Created: 2020-08-25 23:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7f14e2cd865a5bb14c861f27a7ea579 SHA-1: e0edfe578b8dea6181dd68545d5584acac0e8f76 SHA-256: 4a8d7e37134fc4afcbc3df93d988e8a3b56c070f17197443e3c9fca1578f233c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, a common technique for SEO link farms and redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to 'ttraff.ru', which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same lure text and URLs, reinforcing the malicious intent. No scripts were extracted, but the PDF structure and link farm indicate a phishing or redirection attempt.

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/pify?keyword=banner+saga+builds
    • http://wazevut.rockymtnprop.net/uploads/1/3/1/6/131636954/72f798d5752.pdf
    • http://files.connemaradancers.com/uploads/1/3/0/8/130874205/6208421.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/civil_engineering_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7017/6928/files/sheet_music_chopin_prelude_in_e_minor.pdf
    • https://cdn.shopify.com/s/files/1/0440/1286/3638/files/dsssb_je_answer_key_17_19.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/33463799934.pdf
    • https://cdn.shopify.com/s/files/1/0456/4484/1127/files/jeevan_amar_plan_855_proposal_form.pdf
    • https://cdn.shopify.com/s/files/1/0463/9916/0475/files/budovora.pdf
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/worksheet_ordinal_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87913440599.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/nufasirezanijuzivu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/brche_multiplikation.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_off00006f80.bin
ccd06d851fbf6c57a37b626b8c4a8945118c2395a7f414efdcb762c6a41722f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F80 4876 bytes
font_01_sfnt_off00008004.bin
a1c21f1d9a25b84a36579d2f14e0656837e59c85ad9852e117afecaaf99e87fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8004 10444 bytes
font_02_sfnt_off0000a3e7.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E7 4324 bytes

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