Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdb65efdaf44844…

MALICIOUS

PDF

38.9 KB Created: 2020-08-21 21:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c57ed43feb43bf1a5a8e4e0a27119be SHA-1: b3337dfbbeb23dabd0a0c4f9e479676e803b0525 SHA-256: 8cdb65efdaf448447fd74ef3ae633818d61a1dd7d31235f17ff23f8056dc8e9c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Fpsc challan form online' and the malicious URL, suggesting a phishing lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely used to obscure the malicious redirector.

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=fpsc+challan+form+online
    • http://jomix.pricklygal.com/uploads/1/3/1/3/131380429/vepakoti-fafix-vetafi-kurasalol.pdf
    • http://files.kubikhouse.com/uploads/1/3/1/0/131070912/f1dc06.pdf
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/gunowoze.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/febakigidafiwujopoxawuxig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/bus_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0439/9867/5102/files/statistical_methods_for_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/rajewavodibawazizet.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/rifijinilevisevokuposag.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/juvutaja.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/mario_brothers_games_for_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/80641747059.pdf
    • https://cdn.shopify.com/s/files/1/0437/7798/2626/files/nidebolapunojelolebudu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/nikosatikegoxipaduzuga.pdf
    • https://cdn.shopify.com/s/files/1/0435/4090/6143/files/army_asu_uniform.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_off00005a6e.bin
97b9c62400d8744bbe71795a5a277a3900bf496174f91b95df48d1333da1dd52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6E 5208 bytes
font_01_sfnt_off00006bfb.bin
dbab962c54ba4fb9b49923ac1017e0d48471a4309826b888b0fa21a85f5df040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFB 10240 bytes

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