Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1c0a73082f7f1f…

MALICIOUS

PDF

56.0 KB Authoring application: Nitro PDF First seen: 2020-08-10
MD5: c93a736967f169c4d8137e698867fbdf SHA-1: ce5e4680732706ec63e70f8ddba067b02e9d8b4e SHA-256: 8e1c0a73082f7f1f4bdb486a9d4a06ed8b7bd85077e637ed6b7723a20bc6a634
160 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm designed to drive traffic. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' and the presence of embedded URLs strongly suggest a phishing or traffic-driving campaign. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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://rebornanimalrefuge.com/uploads/1/3/0/6/130604207/8348409.pdf In PDF document text
    • http://promisewed.com/uploads/1/3/0/5/130540182/86520918e5f0a.pdfIn PDF document text
    • http://mysteretro.com/uploads/1/3/0/4/130476033/73fc9a03a.pdfIn PDF document text
    • http://newpathorg.com/uploads/1/3/0/2/130291800/4866703.pdfIn PDF document text
    • http://naillogicinstitute.com/uploads/1/3/0/5/130539113/kiwederupifu.pdfIn PDF document text
    • http://towerpictureframing.com/uploads/1/3/0/2/130289792/5387699.pdfIn PDF document text
    • http://mshannahfreeman.com/uploads/1/3/0/5/130543671/namunez.pdfIn PDF document text
    • http://onlygodcanjudgeus.com/uploads/1/3/0/4/130483213/6965708.pdfIn PDF document text
    • http://qpessentials.com/uploads/1/3/0/4/130436040/5377225.pdfIn PDF document text
    • http://orphancaresolutions.com/uploads/1/3/0/4/130489097/mowemunapi_julexeroji_fafog_bekijibubib.pdfIn PDF document text
    • http://michalrutkowski.us/uploads/1/3/0/2/130272443/sunezevipotas-jukifidegu.pdfIn PDF document text
    • http://themusiclaboratory.com/uploads/1/3/0/2/130271099/3713055.pdfIn PDF document text
    • http://neflopioidepidemic.com/uploads/1/3/0/5/130546392/130546392.html#orphan+black+season+2+torrentIn PDF document text
    • http://linux.thai.net/projects/fonts-tlwgIn PDF document text
    • http://www.thaitux.infoIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377 9928 bytes
SHA-256: a0a5836fff182519c1ee91663bdc8a9dad7b715005476ec9c622237ecfc1ca1a
font_01_sfnt_off00006f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F79 12368 bytes
SHA-256: 6ac2b7233f0628a9de3117bc83a968c66e39d0094111b0f596ffa55bc3eeb390
font_02_sfnt_off00008b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B37 6980 bytes
SHA-256: 5b82149047b1021a403157cc09acf73c5e16d52c9431d67015fc712b539f21bf
font_03_sfnt_off0000a050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA050 2604 bytes
SHA-256: 83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe

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