Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9dc5c96891cda84…

MALICIOUS

PDF

35.5 KB Created: 2020-08-24 17:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e19fc95be10e1369ecf52681516f706 SHA-1: 90cb2978f49a9967a149f5efbb95141ed94a4907 SHA-256: d9dc5c96891cda846d1985c9304d3915df651a270f3fe6e887e259ad67f28970
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a 'flute guide for beginners pdf' but redirects to malicious infrastructure. The ML classifier strongly supports maliciousness. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further stages of the attack.

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=flute+guide+for+beginners+pdf
    • http://files.shoplashmayhem.com/uploads/1/3/1/6/131636692/rowopaj.pdf
    • http://files.nullaginecrc.net/uploads/1/3/2/6/132681665/panaramisazesis.pdf
    • http://files.davidformanproject.com/uploads/1/3/0/8/130814980/2333998.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/wilebowifowuvijeka.pdf
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/kaperuzutov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/ruwisolala.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/butimeponuzumodovupazaton.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/ilpa_fee_reporting.pdf
    • https://cdn.shopify.com/s/files/1/0438/1310/9917/files/weighted_calisthenics_routine.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/zenuxaresagutixefo.pdf
    • https://cdn.shopify.com/s/files/1/0439/7416/4638/files/nekadukulakafube.pdf
    • https://cdn.shopify.com/s/files/1/0438/4499/3181/files/15156258186.pdf
    • https://cdn.shopify.com/s/files/1/0432/6001/8852/files/abandono_y_maltrato_animal.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/51563675842.pdf
    • https://cdn.shopify.com/s/files/1/0432/9675/1771/files/ac_market_free_data.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_off00004dce.bin
319366ae2c3d32fc3ad6eeaa2eeba303c97d3894b0f68433ac320a231d12204a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DCE 5096 bytes
font_01_sfnt_off00005f29.bin
4cdf2b4e962d91f6749bdb2bc95d35df92abaaa49b6ee432c4eefbcb4285d23e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F29 9984 bytes

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