Malicious PDF — malware analysis report

Static analysis result for SHA-256 7464175f7ca778bc…

MALICIOUS

PDF

46.4 KB Authoring application: Nitro PDF
MD5: 4bfaeb5b859d5d252fa1e6f51173af31 SHA-1: 20df56e78626121dadc0d1feee61ff4d2d78de6f SHA-256: 7464175f7ca778bca880f507fecb05541b863624cd3022c5c7bdd6b577a4d02f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm designed to distribute malicious content. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports a phishing or malware distribution scheme. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://carrieandandrew.com/uploads/1/3/0/6/130621105/a81ca07412.pdf
    • http://kristawassenaar.com/uploads/1/3/0/7/130739353/83611.pdf
    • http://advertisingsa.com/uploads/1/3/0/2/130273625/nofowakazos-gawojag-viwofiruzig.pdf
    • http://cavecellars.com/uploads/1/3/0/3/130323817/buwakakuki-bazuvomiren-kusinabina.pdf
    • http://1123rd.com/uploads/1/3/0/6/130604581/3879335.pdf
    • http://solidefitness.com/uploads/1/3/0/5/130546971/97e93fb.pdf
    • http://ooredoomaldives.net/uploads/1/3/0/7/130775936/3136643.pdf
    • http://plutusmerchants.com/uploads/1/3/0/6/130640031/nonositezubo.pdf
    • http://smiledefenders.net/uploads/1/3/0/4/130476395/9014536.pdf
    • http://brianmary.com/uploads/1/3/0/2/130272283/4903491.pdf
    • http://www.mikemoremoney.com/uploads/1/3/0/5/130551267/2f9dcb910.pdf
    • http://www.moxielifedesigns.com/uploads/1/3/0/9/130969790/gofed_lewefigop_xuxixi_nuwisa.pdf
    • http://bisoncoffeehouse.com/uploads/1/3/0/9/130969565/pogurerusu_xedilititeziv.pdf
    • http://shangrila.com/uploads/1/3/0/6/130620327/dipokumurike-sowelimogewi.pdf
    • http://willamettevalleybookkeeping.com/uploads/1/3/0/7/130739833/vigevumewafu.pdf
    • http://estatesalecompanyrochester.com/uploads/1/3/0/8/130813648/7f3e24931.pdf
    • http://happyweitravel.com/uploads/1/3/0/6/130605168/3728620.pdf
    • http://www.hudsonvalleymemoir.com/uploads/1/3/0/3/130324037/7547638.pdf
    • http://loveandadog.net/uploads/1/3/0/6/130621298/7fb66.pdf
    • http://north-shore-aerial-imaging.com/uploads/1/3/0/8/130814967/ratowazilupabo_wodem_guletadezi_vanubonanudopar.pdf
    • http://mauleparts.com/uploads/1/3/0/2/130291783/3120598.pdf
    • http://host.creativedatainc.com/uploads/1/3/0/8/130873932/130873932.html#adobe+reader+x+standard+free+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000039cb.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0x39CB 16036 bytes
font_01_sfnt_off0000518c.bin
877172891e8d15ff9b23c0c4ba4b58981835f973264d69313966de681dd767d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x518C 9100 bytes