Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a26a22f6a85884…

MALICIOUS

PDF

38.7 KB Authoring application: Pdftk
MD5: 6299e71c1abc626d4ed1e1b72c6a1a50 SHA-1: 2d166f758e27c6477315b904243168dccdfcffc0 SHA-256: 85a26a22f6a8588422623270efda2b138a9cc748a1387a7d39caf5928903078e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links to external PDF files hosted on various domains, indicating a link farm or a distribution mechanism for further malicious content. ClamAV detected this file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier assigned a high probability of maliciousness. The document body itself appears to be corrupted or obfuscated, preventing a clear understanding of its direct user-facing content, but the heuristic firings strongly suggest a malicious intent related to link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://atssbregion1.com/uploads/1/3/0/6/130604509/fazawusi.pdf
    • http://jasper-marianek.biz/uploads/1/3/0/8/130814100/2c5adb3cf06.pdf
    • http://mcaroadsidedeals.com/uploads/1/3/0/7/130775858/wejekola.pdf
    • http://dumarsinc.com/uploads/1/3/0/7/130739366/mozoxu-bagagiz-litetulu.pdf
    • http://muttsociety.com/uploads/1/3/0/7/130739871/7697908.pdf
    • http://www.ourbetahalf.com/uploads/1/3/0/8/130874175/a92ba74c175.pdf
    • http://affordablewarbird.com/uploads/1/3/0/6/130605399/42436.pdf
    • http://www.heavygratitude.com/uploads/1/3/0/6/130620620/nixekolinixoke.pdf
    • http://luvofit.com/uploads/1/3/0/5/130550792/c366aaea.pdf
    • http://melaniegarunay.com/uploads/1/3/0/6/130603725/5678636.pdf
    • http://serialchiller.net/uploads/1/3/0/6/130620861/mibusibuvazofez.pdf
    • http://lkradio.online/uploads/1/3/0/5/130590295/3181347.pdf
    • http://theoilymixer.com/uploads/1/3/0/6/130622042/bidobefubugaxu.pdf
    • http://marketreport.info/uploads/1/3/0/5/130590588/boludag_vevapin_paneborotuwifu.pdf
    • http://boostfoundationinternational.com/uploads/1/3/0/2/130289353/253847.pdf
    • http://dancemarketing.co/uploads/1/3/0/7/130775701/290933.pdf
    • http://barrringtonnj.us/uploads/1/3/0/7/130775983/1605.pdf
    • http://asylumgeek.com/uploads/1/3/0/3/130323124/dejevafeven-gadolezulalase-mesofobowozoz.pdf
    • http://poeonline.net/uploads/1/3/0/6/130640039/43063cc85d1.pdf
    • http://collegeauditionsupport.com/uploads/1/3/0/5/130544136/mifamalusalelimigov.pdf
    • http://cruisesceptic.com/uploads/1/3/0/7/130739443/sapukibofunej.pdf
    • http://www.triedandtrueforyou.com/uploads/1/3/0/4/130483123/f0f83c.pdf
    • http://ll4kf.slpny.com/uploads/1/3/0/5/130550967/130550967.html#developing+writing+skills+in+spanish+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034c0.bin
de26562cbe29fbf2b999811d0fcf163f10277ed267828bc5e11622e46a8d351a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34C0 8764 bytes

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