Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2202d349219e98…

MALICIOUS

PDF

42.2 KB Created: 2020-09-02 02:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c24df03b525ce8a3472c8d93dbd3fce2 SHA-1: 6627ef0eb851d5c9611ba5b261565be0bc7e2539 SHA-256: 2f2202d349219e98267b6e7599b1912f6585f63bd8f3dbd7dcc1ed32c8c0991a
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a dictionary search, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a larger link farm, likely for SEO manipulation or distributing malicious links. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link strongly suggest a phishing or redirection attack.

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/pify?keyword=oxford+dictionary+french+english+free In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/introduction_to_mechatronic_design_carryer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/34829196017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6221/4304/files/80078711365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5649/4757/files/nevowavof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66656561998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5118/8125/files/limit_0_0_belirsizlii_kk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/25997850903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1803/1002/files/dipenugefiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2629/2634/files/galaxy_saturn_turbo_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/dryer_sheets_work_for_bed_bugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/23887671222.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3f727f6ac632499190095df9fa5c858d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6924eb_cdf5d3cba6c542c39599d7d763cf6755.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c345b0_5529d45a9ab745c4b22ee99a98368af4.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_off00006514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6514 5480 bytes
SHA-256: 871a0562ef1400f72a74bd72aeb537d3f907e7093f2f6993b8c6d4225f2f3209
font_01_sfnt_off000077be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BE 10844 bytes
SHA-256: 364e11c2a5d645891e5b3d8a6488759572b584f686f232642d59942ea582d5d9

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