Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cdb9ca3b21fa8f…

MALICIOUS

PDF

46.5 KB Created: 2020-08-26 04:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54432bc25aed1b2de4f1e39012d5e68b SHA-1: 5f3228db5a7769cec970863bdde9e2163cbb1dd8 SHA-256: 08cdb9ca3b21fa8f083b34a85a5e8e29c91351f664645c3b203f7381c3155ced
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'weekly hourly calendar pdf' and references the wkhtmltopdf tool, suggesting a lure. The numerous links, many pointing to Shopify domains, likely form part of an SEO link farm designed to attract clicks to the malicious redirector.

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.com/pify?keyword=weekly+hourly+calendar+pdf In PDF document text
    • http://files.englishangles8.com/uploads/1/3/2/7/132712120/e274a.pdfIn PDF document text
    • http://files.coveyoak.com/uploads/1/3/1/4/131437157/1178138.pdfIn PDF document text
    • http://jeduw.onehorseranchphotography.com/uploads/1/3/0/9/130969090/tagerobeku.pdfIn PDF document text
    • http://semujes.1ofafindonline.com/uploads/1/3/1/3/131380005/zepovabudiki_sugasotosat_wewalifa_jijeman.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/1/0431/2478/5313/files/kewiragigob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/jejurogoxaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/654716764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/85406662586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/lakofikimatimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/purimusafefudefonijilosag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/77451670633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/bwv_125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/21013528198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/nuligowetogatobufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/gupowufap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/bugdom_2_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9479/3635/files/dumiwakepajow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/14069763158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4448/7836/files/gukosedizonekekeloteb.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_off00006f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3F 5244 bytes
SHA-256: d377eeacc5b4ba1a1d392534f77f868a5dbb62920069235e25dc955a2e8925e0
font_01_sfnt_off00008124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8124 13828 bytes
SHA-256: 177f849ee2f8351994f831ce92e6ae665c892949a18f50a9acb27ebec9afc529