Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33d27e0c2cefcb3…

MALICIOUS

PDF

64.4 KB Authoring application: PDF Studio First seen: 2020-09-07
MD5: 89c47627394d25866ec2cdb11f6e7477 SHA-1: 597a53afaffa06823e01fa282f719accbc467542 SHA-256: a33d27e0c2cefcb338a42bef70913b8383138d6efaaf041e48d2e809fd019cf1
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious intent. The primary goal appears to be directing users to a network of websites, likely for phishing or SEO spam purposes. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://abundantyoga.com.au/uploads/1/3/0/6/130639147/0dbf79d54340c85.pdf In PDF document text
    • http://eurekaoracle.com/uploads/1/3/0/5/130588899/e1a63a.pdfIn PDF document text
    • http://wgmj.com/uploads/1/3/0/6/130640072/5773520.pdfIn PDF document text
    • http://tommaddreyimages.com/uploads/1/3/0/6/130639098/867220.pdfIn PDF document text
    • http://asirap.org/uploads/1/3/0/4/130488338/wujope_remose_fujuvidibavaduf.pdfIn PDF document text
    • http://981themarcoislandfm.com/uploads/1/3/0/8/130814129/841042.pdfIn PDF document text
    • http://nebraskansunitedforthegoodlife.net/uploads/1/3/0/7/130775675/jojop_nogudujuwisevo_goredetopuniz_fevekajixovi.pdfIn PDF document text
    • http://onnona.com/uploads/1/3/0/6/130621412/mijevuxomararel.pdfIn PDF document text
    • http://maxpromo.org/uploads/1/3/0/3/130379319/5682159.pdfIn PDF document text
    • http://botanicahomebody.com/uploads/1/3/0/4/130435748/bujukab.pdfIn PDF document text
    • http://littlestreamfarm.com/uploads/1/3/0/6/130605269/tumitixavidozopame.pdfIn PDF document text
    • http://emilystiehl.com/uploads/1/3/0/3/130379611/a64fecbc3839d1.pdfIn PDF document text
    • http://www.odflex.com/uploads/1/3/0/6/130621421/ef26f5a5d0d.pdfIn PDF document text
    • http://laurenwalker.net/uploads/1/3/0/5/130540823/daeb8c.pdfIn PDF document text
    • http://blissmacau.com/uploads/1/3/0/5/130551064/633c4c62fdca.pdfIn PDF document text
    • http://axissyllabus.net/uploads/1/3/0/4/130483583/6472729.pdfIn PDF document text
    • http://bayareahaulingdemo.com/uploads/1/3/0/2/130272552/7390232.pdfIn PDF document text
    • http://30nlr.bpmtc.com/uploads/1/3/0/7/130740265/130740265.html#english+grammar+learn+through+tamil+pdfIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 7544 bytes
SHA-256: 16f090d4ce18c2df72107a6cec79756aee98dffa539bbe3d3ae34675b4bbab9e
font_01_sfnt_off00007dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBE 24196 bytes
SHA-256: 9a69a556459a01ed7812711a13989cfbd02ce4df04bb74a076347a46d0953865

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