Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7cebfc4e76a6db7…

MALICIOUS

PDF

32.2 KB Created: 2020-09-05 18:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1f575ebc32ae6c51d249759fed539e7f SHA-1: b7b8ac8d8b2cfce52559ba9f29b5cfede916b0b3 SHA-256: c7cebfc4e76a6db77bdb65c20d4c2511abc4b4d65c51db970019e76b7a425765
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, disguised as a guide for a "porter cable dovetail jig template". This redirector likely leads to further malicious content or exploits. The document also functions as a link farm, pointing to numerous other PDFs, potentially for SEO manipulation or to spread malicious links further. No scripts were extracted, but the embedded URL and the heuristic firings strongly indicate a malicious redirection attempt.

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=porter+cable+dovetail+jig+template+guide 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/1/0428/7240/6179/files/50870932814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/narigezeviki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/hathway_cable_tv_packages_2020.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0779a3_81e9083df12c494c800f4b2f0b39700b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fe83c3_9a1cfb80dd9349fba5ce295074676e4a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_54a8aafbb542419fa5888ecb6c672759.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a86d68_2eb5443c1a5a45b799663fcd61f75359.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/575fb0_9244dea7071c4394ac4a3b13b51e1e68.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a88913aca34a46ac801ddf5c6929cbb0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/1273/5396/files/3549081707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/43425643531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/steel_design_segui_5th_edition.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_off000041ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41EA 5492 bytes
SHA-256: 4a749a2fc810cd482d4a488d4b66086ff558ccfe44501c7d5934e89865ada940
font_01_sfnt_off00005488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5488 8808 bytes
SHA-256: d05d2852c78a90ca7b9250ceeb4cb8287480fe2cf706f264e67f840a0cb9e1e5

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