Malicious PDF — malware analysis report

Static analysis result for SHA-256 8334328134d2526e…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 19:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c47d39d6d6ecf6dede9ea24d52363f72 SHA-1: 6c86e57f992b98c49ab31e56c39aedc2ad213dc7 SHA-256: 8334328134d2526e86a01cc36a8a072fa517a469b9a6d4c3050d524fdb2c18c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a link farm designed to generate SEO traffic. One of the primary links, 'ttraff.com', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and other benign-looking PDF links, suggesting a social engineering attempt to drive traffic to malicious infrastructure.

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.com/wix?keyword=converse+plataforma+grises+altas
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4683/8176/files/arduino_reference_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/dixovuzixaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/12837952816.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/nizinozipotizibabavun.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/gerund_and_participle_phrases_worksheet.pdf
    • https://static.usrfiles.com/ugd/804ff6_df7570ce03aa46aebba4147221f8e8fd.pdf
    • https://static.usrfiles.com/ugd/4b874d_faccfb15f7754ab383bac7f89e91ab2a.pdf
    • https://static.usrfiles.com/ugd/23e9be_24a5b739546842ea9a3d426b90e33193.pdf
    • https://static.usrfiles.com/ugd/44b221_3d04185d90d641759cd6db6f514e86b8.pdf
    • https://cdn.shopify.com/s/files/1/0431/3205/9810/files/24744287433.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6064/files/gozujo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/blank_calendar_september_2020_printable.pdf
    • https://cdn.shopify.com/s/files/1/0437/4780/3287/files/nomivamikeledikexuruta.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/migazogumaguxuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5918/files/49590778476.pdf
    • https://cdn.shopify.com/s/files/1/0464/6076/4312/files/follow_up_on_proposal_email_template.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061de.bin
c52ff43f7d0190841c0ecc5bc864b8eb68ac2d7fb06483de4f0865af64330f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 5188 bytes
font_01_sfnt_off00007375.bin
e9ad79c3fd761ced4b91d71581f992583f7175d798f42d22fbb619864093ca49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7375 11840 bytes

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