Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5dc1198cd4922b1…

MALICIOUS

PDF

37.1 KB Created: 2020-08-31 11:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a39a1143e4af16552fc5da47e17edd0b SHA-1: 89690d80418597ea8c4bacb7397c3a9c0fd36641 SHA-256: d5dc1198cd4922b1fed8e0047bc44e5f4db93895dc2a66bda09612d7406f8dfd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is likely part of a phishing or malware distribution scheme. The document body also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, though most resolve to benign content.

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=how+to+clean+sharper+image+ionic+breeze+quadra+silent+air+purifier
    • https://static.usrfiles.com/ugd/d9d1f5_da3d87bcf5ba45b685705dbe81ea31ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d7b570e39364345b586ef21a392c2a4.pdf
    • https://static.usrfiles.com/ugd/cac9e4_800b7c92f87e43938a27737902ef37c7.pdf
    • https://static.usrfiles.com/ugd/cc14e4_b710964ea86149c491439964c1853d17.pdf
    • https://cdn.shopify.com/s/files/1/0437/4023/3879/files/algebra_2_textbook_mcdougal.pdf
    • https://cdn.shopify.com/s/files/1/0461/0955/6899/files/kedoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/kemagufibolimobibolameg.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/84851287562.pdf
    • https://cdn.shopify.com/s/files/1/0440/7505/7302/files/28024211305.pdf
    • https://cdn.shopify.com/s/files/1/0434/1419/2284/files/sedirotutokurobigikexibot.pdf
    • https://cdn.shopify.com/s/files/1/0439/5070/2750/files/biogeochemical_cycles_test.pdf
    • https://cdn.shopify.com/s/files/1/0436/3101/8142/files/keurig_k3000se_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/2321/7318/files/63805746547.pdf
    • https://cdn.shopify.com/s/files/1/0431/3818/7413/files/obsidian_farm_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9015/files/back_to_school_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0437/5658/5111/files/vosezezinixetifiwaba.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_off000051e3.bin
03bb7b221aeb0063e0b372b31d7e3758a8dd0334918aa662dbb9c07d541dfe7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E3 5936 bytes
font_01_sfnt_off000065ee.bin
b751809add0e04d6e4e18cd9d8de12945a9c67a4cf50562c3fdebd0d79567ecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65EE 9680 bytes

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