Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3340d25e5145213…

MALICIOUS

PDF

45.3 KB Authoring application: PDFBox First seen: 2020-09-07
MD5: 641a3d041f754dba6487c06f1c57f317 SHA-1: 73011ef428a292db0e9d4b2b7dc0581e27f61e0f SHA-256: a3340d25e514521307ceb9fd38a87c0ee110f8a68af1e0e65653d51a8e0a13a2
192 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains. The ClamAV detection further confirms the malicious nature of the file, classifying it as Pdf.Phishing.TtraffRobotInstall. The embedded document body text is heavily obfuscated and does not provide clear intent, but the link farm strongly suggests a phishing or malware distribution campaign.

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.
  • 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://hostmaster.q5safaris.com/uploads/1/3/0/5/130539249/7746013.pdf In PDF document text
    • http://domoniquemhollins.com/uploads/1/3/0/5/130541846/dojuvavasureni.pdfIn PDF document text
    • http://jimandcarolgarlow.com/uploads/1/3/0/7/130738623/muvakawep.pdfIn PDF document text
    • http://homehealthmidwestcovenanthome.com/uploads/1/3/0/7/130776791/wunugadilag.pdfIn PDF document text
    • http://hostmaster.milkandhoney.care/uploads/1/3/0/4/130483273/sukirajajupis-wenikusaziwoxe.pdfIn PDF document text
    • http://www.rebeccacranstonforcolorado.com/uploads/1/3/0/2/130270963/8471402.pdfIn PDF document text
    • http://kharmarecords.com/uploads/1/3/0/5/130588532/6116222.pdfIn PDF document text
    • http://israeling.net/uploads/1/3/0/2/130270748/gofabofutexa.pdfIn PDF document text
    • http://harrisreiss.com/uploads/1/3/0/3/130323889/6048179.pdfIn PDF document text
    • http://acceleratecleaning.com/uploads/1/3/0/3/130379423/2034814.pdfIn PDF document text
    • http://www.pesgba.com/uploads/1/3/0/8/130814492/5774146.pdfIn PDF document text
    • http://nmpstag.com/uploads/1/3/0/5/130588596/rajabomeluvina_nesid_funugusop.pdfIn PDF document text
    • http://lexigoldberg.com/uploads/1/3/0/2/130288514/tuzojomozadebij.pdfIn PDF document text
    • http://medicinaalternativabioenergetica.com/uploads/1/3/0/6/130620296/49df68937e6a9aa.pdfIn PDF document text
    • http://tinker-shire.com/uploads/1/3/0/7/130740616/0435d398b936.pdfIn PDF document text
    • http://tiialofqvist.com/uploads/1/3/0/8/130874224/6660533.pdfIn PDF document text
    • http://echonormal.org/uploads/1/3/0/4/130435763/jukidopaxudezebamidu.pdfIn PDF document text
    • http://charmingworldtours.voyagerwebsites.com/uploads/1/3/0/7/130775652/130775652.html#job+application+email+sample+indiaIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

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_off00003b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B9A 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
font_01_sfnt_off000052ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52EC 8588 bytes
SHA-256: 99a1050fae4b85af92d8d713fb4beaf4e577c0805c196befd6ce3b0e6c5a6ce1

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