Malicious PDF — malware analysis report

Static analysis result for SHA-256 f792486109f35f47…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 20:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2517f8a55471b9a4a2a696e4afe4c82 SHA-1: 9a6228019e00f12c4ca8b76128fd791a87c346e8 SHA-256: f792486109f35f47f94e22678a81bf5e35ecf5ecc48b7d8d04cfbcda4040eb4f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate documents but lead to potentially malicious sites. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at https://ttraff.com/pify?keyword=books+of+the+bible+in+song. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily corrupted, contains the URL https://ttraff.com/pify?keyword=books+of+the+bible+in+song, suggesting a lure to a malicious site.

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.com/pify?keyword=books+of+the+bible+in+song
    • http://files.exceltherapyconditioning.com/uploads/1/3/0/7/130739835/zegobasuto-duzakivabikukuv-vojegavu.pdf
    • http://tigeluko.mistystevensbluegrass.net/uploads/1/3/1/3/131383483/2620353.pdf
    • http://tonawadas.circlecircushoopdance.com/uploads/1/3/1/3/131380485/5672717.pdf
    • http://domoli.takyanyeung.com/uploads/1/3/1/8/131871592/jezotixozawifugod.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/verbal_ability_test_papers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/x_plane_11_keyboard_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/anywhere_travel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/4487/1063/files/someraduzu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5392/1957/files/lepuneputesasomokipoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1013/files/fupesariwidokiliwuros.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/20628865688.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20011772627.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/72880608662.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/smart_textiles_and_their_applications.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/gataxekuku.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_off000078b1.bin
624be5ffcf36e32858d3f9d14318692a0dbf6997ec104d248148466a340a9003
pdf-font-stream PDF embedded font (sfnt) at offset 0x78B1 4976 bytes
font_01_sfnt_off000089a3.bin
e8d9c83a4dd0c97b2d6dba5893abdac3c545ab8852da076f505aaaf2176fe3b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x89A3 10256 bytes