Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a5c07881efb39b…

MALICIOUS

PDF

55.1 KB Authoring application: Mobipocket Creator
MD5: 07e02d754cadb962bf39913372b2f9dc SHA-1: 4247b2201c21f8c76186735a9492f6fe969593d2 SHA-256: 23a5c07881efb39b7d6916490408697ae1ff35ea4bc498cd7adb81732a6479b2
150 Risk Score

Malware Insights

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

The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm or SEO manipulation tactic. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious classification. The embedded URLs point to various domains, all seemingly part of a coordinated effort to distribute content or redirect users. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://1-800events.com/uploads/1/3/0/3/130323967/277438.pdf
    • http://bennettcoffeeroastingcompany.com/uploads/1/3/0/2/130289332/birozinixavagogikor.pdf
    • http://padeljobs.org/uploads/1/3/0/2/130289380/9805019.pdf
    • http://rooseveltconservancy.org/uploads/1/3/0/2/130272905/kusamisetojixup-vures-tibeneb.pdf
    • http://nubusuto.startdogs.com/uploads/2020/01/29/nesozoxet_kujamugif_jolugutasoj_pavobalubik.pdf
    • https://bekezefaxakad.weebly.com/uploads/1/3/0/5/130545954/8394343.pdf
    • http://fos.bonys-clinic.ru/uploads/2020/01/28/worudaxopujikep.pdf
    • http://clucktruckportland.com/uploads/1/3/0/4/130435751/130435751.html#manual+de+usuario+asrock+g41m-+vs3

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012eb.bin
0bbe9059a60c5d87447f07a05f90ab4c9ca8fdf937bb763f7bc7f2c5e4004b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB 12296 bytes
font_01_sfnt_off0000740f.bin
d9455ea77d71c00435dee66c72533adfe93ab53fbf183a4baef29dd5bf0766c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x740F 13736 bytes
font_02_sfnt_off00009201.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9201 16036 bytes

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