Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af78eccb8abb130…

MALICIOUS

PDF

48.4 KB Authoring application: Karbon
MD5: 998568ec4ad46a5ed5678708826a740a SHA-1: cee97a6b8521557e8e330b17309d9e6773f128b5 SHA-256: 1af78eccb8abb130a7085152aef4c3be18aeb3dec96f00068a9a18b3c0a0274a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall, and a machine learning classifier also flagged it as malicious. The document body contains garbled text and some URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://virginiedelaby.com/uploads/1/3/0/4/130488964/sowum-poxiliwora-dazoj-lajumogakase.pdf
    • http://durhamyouthprograms.org/uploads/1/3/0/5/130552017/daxonojutelewuj.pdf
    • http://mwsld.com/uploads/1/3/0/5/130540359/fbe6d398.pdf
    • http://bestforexrebates.com/uploads/1/3/0/3/130323341/0688250ce.pdf
    • http://alwaysamigosyoga.com/uploads/1/3/0/3/130313411/f6dae81d159.pdf
    • http://mydarlingvalentine.com/uploads/1/3/0/4/130488759/kapum-mamurub.pdf
    • http://myrocketflow.com/uploads/1/3/0/4/130490006/renevagi-nulefukomi-donifemow.pdf
    • http://njgraniteconstruction.com/uploads/1/3/0/7/130738505/pepejojugoxom-jesevixav-bewus.pdf
    • http://mirandatinaphotography.com/uploads/1/3/0/3/130313411/zagofuvikiser_nonejewoga_lakufavekapin.pdf
    • http://mylebleutriad.com/uploads/1/3/0/6/130604026/5885142.pdf
    • http://ndchair.com/uploads/1/3/0/5/130541116/130541116.html#senior+android+developer+skills

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001346.bin
64d938772a81e7f0d7bb26d094d11a49f2e332761d6d2cb0d8ba85a14f3a4b16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1346 9340 bytes

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