Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1aed3c4cccb0614…

MALICIOUS

PDF

34.4 KB Authoring application: OpenOffice Draw
MD5: 45405fcc9399a05b963268199955bb5e SHA-1: 2001d4fd82b7c386349e3e13c1e41b3eed8b8e0b SHA-256: a1aed3c4cccb0614bf7dfeaf0917198e6cf25b05f4c4e701b378e2c6b9bf5a89
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, disguised as educational material. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external link farm, and the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' suggests a phishing or traffic redirection scheme. The document body, though heavily obfuscated, mentions 'Kumon answer book level cii reading', likely a lure to entice users to click the malicious links.

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://namlems.org/uploads/1/3/0/4/130435532/gonuxagasan_xawupodo_pafeze_sexaliju.pdf
    • http://dentistryvistaca.com/uploads/1/3/0/6/130640042/ninezineg-nixozo-gabiva-kepufivegavi.pdf
    • http://norcaladventurek9training.com/uploads/1/3/0/4/130477074/migobibalobonob.pdf
    • http://acadiaextracts.com/uploads/1/3/0/6/130620467/6263199.pdf
    • http://2325maurystreet.com/uploads/1/3/0/6/130604470/9179803.pdf
    • http://chrysalisholistics.com/uploads/1/3/0/5/130543772/484a23294.pdf
    • http://krsc.net/uploads/1/3/0/2/130289305/gopezox.pdf
    • http://logevumafi.audiostart07.icu/uploads/2020/01/29/7264937.pdf
    • http://paydaylendinginvestigation.com/uploads/1/3/0/2/130274199/ace927.pdf
    • http://sauerlandhypotheek.nl/uploads/1/3/0/6/130604195/130604195.html#kumon+answer+book+level+cii+reading

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000124a.bin
f98d5f41910c95cb860060bebc7d93abe02dfaa4577df848b9f46402e9b0ca46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124A 8328 bytes

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