Malicious PDF — malware analysis report

Static analysis result for SHA-256 53956bc993686acc…

MALICIOUS

PDF

31.0 KB Authoring application: Pdftk
MD5: 818647a57b29c0928f01d2a2aa81f628 SHA-1: f90e9f183c3b413e5c481b9923f1fef845ce194b SHA-256: 53956bc993686acc918ebc08a6d148f782030c5b5539da380d84f17a2d46e4fb
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly suggest a phishing or malware distribution campaign. The document body, while containing garbled text, also includes some of the malicious URLs, reinforcing the link farm attack pattern.

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://ngravinggifts.shop/uploads/1/3/0/5/130545434/filopevuf-dizusiwiwabunuf-katekowiga-pebagun.pdf
    • http://akkijyrkka.com/uploads/1/3/0/2/130274316/9458039.pdf
    • http://kittoconsultancy.com/uploads/1/3/0/6/130603865/4881609.pdf
    • http://letagizod.lek.moscow/uploads/2020/01/29/2130227.pdf
    • http://sevilya-barselona.online/uploads/2020/01/27/4732187.pdf
    • http://miloandmonroeboutique.com/uploads/1/3/0/6/130621951/jorojuramid.pdf
    • http://koinoniaatclarion.net/uploads/1/3/0/4/130493389/gomujudow.pdf
    • https://gebuvikixel.weebly.com/uploads/1/3/0/4/130476407/kovewej.pdf
    • http://bonniesthlm.com/uploads/1/3/0/2/130287289/a3b5e14ea78b.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/6/130621063/130621063.html#passive+voice+present+simple+past+simple+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011df.bin
1c7f8baa4b021c564c414b4f4d807aa8255501f2f15df4b61e9bb8281dd549cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF 7628 bytes

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