Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ffc787f9c259b1…

MALICIOUS

PDF

28.9 KB Authoring application: QPDF
MD5: 810f0fec3ccde41538ea0533dc27828e SHA-1: f0db0e90c0d6c169c9e8601670546622050ffc11 SHA-256: 01ffc787f9c259b149dcbc225e35f362a9f69c6cb4ac161f05897d88f0889fdd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also indicate maliciousness, with ClamAV specifically identifying it as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The embedded URLs likely lead to further malicious content or phishing pages, suggesting a phishing or SEO spam campaign.

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://chriswongfitness.com/uploads/1/3/0/5/130542935/ponalelekumu.pdf
    • http://elizabethgracepaperandpen.com/uploads/1/3/0/3/130324005/sevig.pdf
    • http://bucketsofbrassandcopper.com/uploads/1/3/0/5/130551053/3539988.pdf
    • http://missioncovenantyouth.org/uploads/1/3/0/5/130588515/nepefeju-welitum-bifusigeti-tefakobu.pdf
    • http://www.msmurphyschemistry.com/uploads/1/3/0/4/130483515/6ffae60717b9.pdf
    • http://healthiersoils.com/uploads/1/3/0/4/130436188/nujetujotuf_tosidozixokiza_jodoxazanif_sinapu.pdf
    • http://www.elphceramics.com/uploads/1/3/0/4/130476597/wutejasexepufub.pdf
    • http://run50yourway.com/uploads/1/3/0/7/130738917/1654384.pdf
    • http://deckmachine.com/uploads/1/3/0/7/130739867/kukasonun_neliza_vifakoj_bifefineri.pdf
    • http://www.sirishart.com/uploads/1/3/0/5/130546606/e7d0a73b442c.pdf
    • http://adsl-63-204-18-31.benefitplans.org/uploads/1/3/0/5/130551427/130551427.html#acls+post+test+answer+key+2018+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001af7.bin
e72e4c534b6019a8f557a4cee1b0c0c0cc3a27e6084b8d5d5fec72836273d1bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF7 7568 bytes

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