Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13591da046e9baa…

MALICIOUS

PDF

68.8 KB Created: 2020-08-25 14:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 437e8467936dddd89c21c6924eb1f833 SHA-1: fe7fa396fc48f2a50bf208f0d94ec81ee479e125 SHA-256: c13591da046e9baa144829edda583435efed1aa2144119fc37468a36f67f2913
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous links, identified as a link farm, designed to redirect users to malicious infrastructure. One such link, 'https://ttraff.ru/pify?keyword=hard+quiz+questions+and+answers', is flagged as malicious. The document body and heuristics indicate an advance-fee scam lure, suggesting the user is enticed with a quiz or prize to click the malicious link. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.ru/pify?keyword=hard+quiz+questions+and+answers In PDF document text
    • http://files.millerlandscape.com/uploads/1/3/2/6/132680808/nuzemegalikam.pdfIn PDF document text
    • http://began.patrickdonnellypoetry.com/uploads/1/3/1/4/131406082/38fc24.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/1/0431/1370/9725/files/jifewaxewikovinek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/horde_questing_guide_bfa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/42201805067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/69092584788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/wotibadozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/67874820933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/whirlpool_duet_washer_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1663/2992/files/leon_plus_anesthesia_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6851/4453/files/pegugomuzulajiluratu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2861/0971/files/embed_jasper_report_in_php.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/galejukebu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC42 5016 bytes
SHA-256: 8be95ba6de3afbfc85079886477f27af6a6bd2c3b9cd05266faf75953c8df294
font_01_sfnt_off0000cd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD74 10588 bytes
SHA-256: 73862ae8a5614b5f9ccc726d980cb8f734b4eb8c2190d3f0b2f2b7bed56332cd
font_02_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 16064 bytes
SHA-256: a38b90a17f05938132fc526e9d4a309d49e481696ab613685b03074c5c9861c5

Open this report in the interactive analyzer, or submit your own file for analysis.