Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64b7ec3d1a3945a…

MALICIOUS

PDF

40.0 KB Created: 2020-08-12 14:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44fc1e3826fc12e4a4d338fb6959b2e2 SHA-1: 12375fdcad3cc8b61a8768b9b4afc993b88caf24 SHA-256: c64b7ec3d1a3945a89eff2e6defc96129b221d039cf0081ac32114f838716fc5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious infrastructure at ttraff.cc. This indicates a social engineering attempt to lure users to malicious content, likely for further exploitation or malware delivery. The document body contains obfuscated text and a reference to 'barkus book pdf', suggesting a lure related to book downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.cc/pify?keyword=barkus+book+pdf In PDF document text
    • http://files.onsacredgroundlandtrust.org/uploads/1/3/0/7/130739719/kofupaxifuxo.pdfIn PDF document text
    • http://virowepa.thecannacontainer.com/uploads/1/3/1/0/131070109/pifinagorudivat.pdfIn PDF document text
    • http://sasux.sumetfitness.com/uploads/1/3/1/6/131636789/bewutadoxokefa-sabalotumerez-wekizarozajaf.pdfIn 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/1/0432/3786/7687/files/wiwurasewatepazululo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/angler_s_outfit_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4521/5637/files/94788662123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/wovenibupilevulupelese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6580/2905/files/zuduzuzopanuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9353/9478/files/85677025886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/95341073106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/anatomy_for_sculptors_understanding_the_human_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/piketatomuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0684/3288/files/46946811809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3072/1190/files/boolean_algebra_in_computer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1061/1605/files/637144644.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 5256 bytes
SHA-256: fe4f0bc672cd33e9be430639ac823066d4c9b4158c16ee9b628cb70c717b5694
font_01_sfnt_off00007210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7210 9800 bytes
SHA-256: 8fae53961f30006ceaa44d36d87c0e9313cf627c864e9d2b73c28b06e2ec5370

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