Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23b7bdabfbf42c8…

MALICIOUS

PDF

54.7 KB Created: 2020-08-13 22:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03696b9babbaf5555afb6bebc1633d9a SHA-1: 6382870c70b0b1081ba427940aa3d7ba2271ef07 SHA-256: b23b7bdabfbf42c877b82d7924b2193acf3353ae004ec4af47c67b8eb69a3ce7
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=validity+in+psychological+testing+pdf. This indicates a phishing or redirection attack, aiming to lead the user to harmful content. The document body text, though partially corrupted, includes the malicious URL, reinforcing the attack vector.

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=validity+in+psychological+testing+pdf
    • http://suboli.thesaxsmith.com/uploads/1/3/1/0/131070420/wilagavuribamuvu.pdf
    • http://files.frankdrake.org/uploads/1/3/0/8/130873828/6045972.pdf
    • http://files.activealuminium.com/uploads/1/3/0/7/130739084/miguxot-fegelofup.pdf
    • https://cdn.shopify.com/s/files/1/0454/6691/0872/files/bsc_mlt_syllabus_ptu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/bundesliga_spielplan_2020_19_rckrunde.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/41741138849.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/dujedinegogiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/19998562017.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/kakemopuzot.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/11596157901.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/95157812187.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4882/files/lesujededatixamubugavow.pdf
    • https://cdn.shopify.com/s/files/1/0440/1371/5606/files/store_keeping_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/51792712830.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/66516205868.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_off00009396.bin
1e18f900f17e543ad8ff9e0315e57c0236bb3dc23779ae25a6ad5b6cca51084f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9396 5388 bytes
font_01_sfnt_off0000a5f3.bin
47bc6a25bed0bdf53b23f79a391d1eed91a59a817a5cb374ed2aee6a3f31c6f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F3 12476 bytes

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