Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7643fccf004776c…

MALICIOUS

PDF

41.0 KB Created: 2020-11-03 08:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 90175dcd3538eaa65f7eb43915abdd2d SHA-1: b3769b654b8bd19f30149043ad56666b02dbf618 SHA-256: b7643fccf004776cb9ba59be59fc9742a0558c030a88b04bd5083752ef8f6014
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially obfuscated, includes the URL 'https://ttraff.club/123?keyword=mohan+ski+school+coupon', which is flagged as malicious. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, likely to obscure the malicious redirector.

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://ttraff.club/123?keyword=mohan+ski+school+coupon In PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/5c16512096954b9.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/7f8d26661a478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5f9f6b5920d7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5f96bd3581fca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/ap_exam_dates_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4105/4105/files/maria_victoria_henao.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/98984525334.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/vafizurijafazexaworelak.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/lebasoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8440/1819/files/download_cyberghost_vpn_full_crack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/sonupibizisexiguvejud.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/fudalateredikukipepup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0130/2168/files/pending_pickup_fedex_meaning.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6204 4992 bytes
SHA-256: 09a9ffbdc4b78002d09aa9bdd23578b608ba62c9c2404af5aaa440131f499efe
font_01_sfnt_off00007309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7309 10604 bytes
SHA-256: a02bdf267e34344e01715b02d3d9e461bc6fe9c09106eaab5463225ccf8c864b

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