Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ffc55d812d4f74…

MALICIOUS

PDF

34.4 KB Authoring application: pdf-parser
MD5: 94917435e685daa291fa9fab30461436 SHA-1: 38e54a2f9911bac9c6a68dfee9338d63a2a3cffb SHA-256: 90ffc55d812d4f745db22ff268a2ae1beada81072777b76bd5b3e8a665b89c84
120 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a large number of external links, many of which are hosted on suspicious domains and have unknown reputations. The primary heuristic firing indicates a PDF link farm, suggesting the document's purpose is to redirect users to potentially malicious content or to manipulate search engine results.

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://kiruk.novostroyki-barnaul.ru/uploads/2020/01/27/denujitanapiripox.pdf
    • https://navimigid.weebly.com/uploads/1/3/0/6/130604511/2851176.pdf
    • http://fuz.viptoys.top/uploads/2020/01/29/rajezedozujalonukeri.pdf
    • http://carolynamurao.com/uploads/1/3/0/5/130550888/jajenepix-pilezefedukakad.pdf
    • http://badasspugclub.com/uploads/1/3/0/4/130483739/a0631c47208c49.pdf
    • http://10dayfilm.org/uploads/1/3/0/5/130550956/gerawizajipur.pdf
    • http://gandrkitchenhardware.com/uploads/1/3/0/6/130622077/ramir_setumebopaveg_xigigepim.pdf
    • http://napacounty-rc.com/uploads/1/3/0/6/130604980/femexitose.pdf
    • http://riversidecountyhistory.org/uploads/1/3/0/6/130604069/130604069.html#chicago+bibliography+style+guide

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e1.bin
677b2cb8313b6f7b57c9f778cde275a92404cd872238c0578895ac89016107fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1 7840 bytes

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