Malicious PDF — malware analysis report

Static analysis result for SHA-256 a176dd513ac52d43…

MALICIOUS

PDF

36.9 KB Authoring application: Mobipocket Creator
MD5: 65650a0b09964ffe369acf48531d5e73 SHA-1: cf8ec7adad7c8b8e08be06d625e5cf776d51aa90 SHA-256: a176dd513ac52d43449734a41285cb00d1477e8065d665cc3b5bafc0e5094ca0
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'SE_INVOICE_LURE' heuristic indicate a phishing or traffic generation scheme. No scripts were extracted from this sample, but the extensive link farm suggests a coordinated effort to distribute malicious content or generate traffic.

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://nutritionalbiochemistryresearchgroup.org/uploads/1/3/0/4/130476034/8655168.pdf
    • http://thestorystudiohk.com/uploads/1/3/0/4/130476423/menovomoj.pdf
    • http://christianhartsough.com/uploads/1/3/0/6/130604406/solawepumuva.pdf
    • http://surfergirl.us/uploads/1/3/0/4/130435602/7129535.pdf
    • http://koiinteriors.net/uploads/1/3/0/7/130739061/ecec1479d7d31de.pdf
    • http://myrole.finance/uploads/1/3/0/5/130589386/rifepovezoruzew.pdf
    • http://snirts.xyz/uploads/1/3/0/7/130775654/wifogexugap-dujejadoxut-wiriwa.pdf
    • http://migeorgeson.com/uploads/1/3/0/7/130738701/zuxaz.pdf
    • http://mycccamp.com/uploads/1/3/0/2/130288380/wuteraxikonugi_nidepu_xipad_kuweku.pdf
    • http://www.3822.lanierlakehome.com/uploads/1/3/0/7/130776349/9280910.pdf
    • http://skipcoryell.com/uploads/1/3/0/7/130739404/tatinabezewivoz-ronetakakuna-rabogeje-pitaf.pdf
    • http://eaclubs.net/uploads/1/3/0/8/130814931/pijevufoluva.pdf
    • http://nanoswater.com.sg/uploads/1/3/0/6/130639091/gaturagejejeg_juxurewo_xoweweri_gatoluxiwexad.pdf
    • http://www.4d-planet.com/uploads/1/3/0/2/130287445/wipegako-kizarekuj-jirafa-kabifewakuviben.pdf
    • http://lisa-and-dustin.rominastiebenphotography.com/uploads/1/3/0/4/130488811/130488811.html#profit+and+loss+statement+examples+excel

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034c4.bin
801490283136bf0ca6e602fde7e1d7faa1b169331a7059425f483b6d0c2094dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34C4 8396 bytes

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