Malicious PDF — malware analysis report

Static analysis result for SHA-256 2627ee03f32ba290…

MALICIOUS

PDF

44.6 KB Created: 2020-08-03 15:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 432a511123f54b98ba1c83a4da170b77 SHA-1: 7c340d890c46ced88189e0eeef9d22786415a33b SHA-256: 2627ee03f32ba29092ed7eacfd8c72de84c6c749f245e59a82897cd97e686b55
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=medical+biochemistry+mcqs+pdf'. The document body, though heavily obfuscated, contains text related to 'medical biochemistry mcqs pdf' and the URL itself, suggesting a lure to a phishing or malware distribution site. The presence of a link farm further indicates malicious intent.

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=medical+biochemistry+mcqs+pdf
    • http://files.robertzant.co/uploads/1/3/2/7/132740978/42d70cadeaf1d.pdf
    • http://files.professorcarson.com/uploads/1/3/2/6/132695336/roditigutev_sadavazopoki_zomejelopixab.pdf
    • http://files.frauhoeckner.com/uploads/1/3/1/3/131380213/tupivupatop.pdf
    • http://files.fixfonezfast.com/uploads/1/3/2/6/132696029/1cad3b61ca381.pdf
    • https://cdn.shopify.com/s/files/1/0434/8257/9110/files/dijesojusoki.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/48029167487.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/ferafoxeledo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0577/files/57100806558.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdf
    • https://cdn.shopify.com/s/files/1/0429/3872/8611/files/lofoxuraxonokobefegelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/rexitig.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/xidagamipux.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/99399911770.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/35809196381.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/77201221779.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/jexibugovofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9489/9874/files/56585596224.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/
    • https://cdn.shopify.com/s/files/1/0430/8389/0850

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c42.bin
1ea79e7abf9b8de9529e094931e503b8ebcbc244bc9f6a8c12d4fba66ac0b66a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C42 5768 bytes
font_01_sfnt_off00007fc0.bin
77c649c70102b55fed77f9237aeb83e49597f607dc23c7dae66d8ae66de91dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC0 11556 bytes

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