Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e4245f2aeefb21…

MALICIOUS

PDF

51.4 KB Created: 2020-10-27 16:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f56922e9d7212468dbc5a72e10fdc653 SHA-1: bb0d83eab23aba19fdf8bac368975911f7dfdd16 SHA-256: 75e4245f2aeefb21e6022f6b84df29bcb0743a047878892086fc8e290e4d7e11
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded URLs, many of which point to link farms. One URL, https://cctraff.ru/123?keyword=persona+3+hermit+social+link, is identified as malicious redirector infrastructure. The document's structure and content suggest it is designed to distribute traffic to numerous external sites, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://cctraff.ru/123?keyword=persona+3+hermit+social+link
    • https://josugonu.weebly.com/uploads/1/3/4/4/134488469/2906242.pdf
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/5765613.pdf
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/pifaboti.pdf
    • https://mepetimis.weebly.com/uploads/1/3/1/4/131483418/4460890.pdf
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/1ced6f.pdf
    • https://dulopatejobe.weebly.com/uploads/1/3/4/3/134317335/pegifagibet-masetuxalajap.pdf
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/babobipu.pdf
    • https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/fukabuwa.pdf
    • https://wanuwoziburake.weebly.com/uploads/1/3/4/4/134458428/nuwimawubezipusu.pdf
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/rezoripun.pdf
    • https://bififofivajarat.weebly.com/uploads/1/3/4/3/134315789/rinago.pdf
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/2560394.pdf
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/vokuvaworotegi-gatusukatim-xemugifuripig.pdf
    • https://revokaraso.weebly.com/uploads/1/3/4/3/134320841/pitaforov.pdf
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/kivurakuve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1139/2167/files/libigupibafebeneladuro.pdf
    • https://cdn.shopify.com/s/files/1/0501/4211/8069/files/zekus.pdf
    • https://cdn.shopify.com/s/files/1/0492/9051/0492/files/power_wheels_mustang_parts.pdf
    • https://s3.amazonaws.com/memul/mikorudomesoxe.pdf
    • https://s3.amazonaws.com/zirojopemup/adeept_ultimate_starter_learning_kit_for_arduino.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007739.bin
1d1ee65248d4f10ddfa2d39bb3456b1df245e66f0c5bab4071aa60c928ef7495		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7739 4772 bytes
font_01_sfnt_off000087fd.bin
a3a875f40da14b47e227a69a714093509d57feca68145d995570728c1af34bc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FD 5268 bytes
font_02_sfnt_off000099b3.bin
cffb67bfe22bcb3edefd7a094d0974d1f84181798ae8f8f27174b764ffc8e767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99B3 10700 bytes

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