Malicious PDF — malware analysis report

Static analysis result for SHA-256 c676655ae3a29d92…

MALICIOUS

PDF

65.6 KB Created: 2020-08-19 14:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4cd1ad2633a044b3cda3573a82bf209 SHA-1: 98840b6c3b1df92818c022694a8490f63607d30b SHA-256: c676655ae3a29d92f67e30350c94e8e29176bfb03c7875e0d472d86a5f84af3a
150 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to the presence of a link farm and a redirector to known malicious infrastructure. The document body contains obfuscated text and multiple embedded URLs, including the malicious redirector at https://ttraff.com/pify?keyword=almidon+definicion+pdf. The ML classifier strongly supports the malicious verdict.

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=almidon+definicion+pdf
    • http://files.bringalessiahome.com/uploads/1/3/2/7/132710743/punodisevupuzewebofu.pdf
    • http://files.mindbodyconnectionmassagepilates.com/uploads/1/3/0/9/130969489/fudek.pdf
    • http://kadepiva.studio339.net/uploads/1/3/1/4/131438464/4a92df11c554ee2.pdf
    • https://cdn.shopify.com/s/files/1/0437/4118/4165/files/fajesowivelisunulikuxeliw.pdf
    • https://cdn.shopify.com/s/files/1/0448/3996/0737/files/zekokegemobugaturefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/82267806404.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15501301831.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/17753333112.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/20262497625.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/bacterias_anaerobias.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/98236766568.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/tezuzebopud.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/talalawapedakadakelaluve.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/25703457557.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/gibituwafevisiguw.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084da.bin
ed552d72a4515abddf0f537d2b15b1697c90414c44f7599ddad91c092575f65d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DA 4432 bytes
font_01_sfnt_off00009470.bin
15e6067a05278f5652a753753dee4024d687a3ee9603c4edb40c36457f403dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9470 4808 bytes
font_02_sfnt_off0000a4b5.bin
a508a946fef1baa8a1ae4dbb9e510d0288dda0176eb89ff0154ed3c599ddc93b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B5 2676 bytes
font_03_sfnt_off0000afcd.bin
39ec6daa09789c948bb0f285c0b5430f2bcedf352ccc5da07801e727328eab50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCD 11464 bytes
font_04_sfnt_off0000d678.bin
777e26f577636021e38d779dabad43bb55fa72e128479777152cdfb3105e608b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD678 16480 bytes
font_05_sfnt_off0000ed1b.bin
256cad9725fdc1352f952d4675e655d77973c118006dfdf966e5528b03bf46e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED1B 2676 bytes

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