Malicious PDF — malware analysis report

Static analysis result for SHA-256 193184bfc76f0dee…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 23:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6cc2875f45e05559dd32cc6e96ff4492 SHA-1: 418e79d380f6c7107893d5c9dfb73c35993979dc SHA-256: 193184bfc76f0dee8b5f309e895edcdab2163344202f448fe3e5c8441193251c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating an attempt to lead users to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. The embedded URLs, particularly the redirector at 'https://ttraff.ru/pify?keyword=bibliography+apa+format+slideshare', are the primary indicators of malicious intent, likely serving as a lure for phishing or malware distribution.

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=bibliography+apa+format+slideshare In PDF document text
    • http://zekonale.bayoush.com/uploads/1/3/0/7/130775432/0b0d45e3.pdfIn PDF document text
    • http://files.bashleyart.com/uploads/1/3/1/8/131856310/zekinipev.pdfIn PDF document text
    • http://files.nagamegallery.com/uploads/1/3/0/9/130969656/lawirijajotesos_gimopet.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/1/0436/7086/4025/files/57169700029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9036/5864/files/agriculture_books_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1789/4050/files/64614325280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/jomiluwile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/ridakulifojafafugemofar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8577/4491/files/1548596575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3745/3470/files/divowagezeragixer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4448/7836/files/xepirasemutipididuvoliwik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/opposite_of_sub.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 3

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_off000063ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AE 5748 bytes
SHA-256: 5ccc8ba65c6a82fc39958acb6947f658c9392014be5b46bcda9aef1b71494433
font_01_sfnt_off00007710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7710 10460 bytes
SHA-256: 608d2ec399b934e471e6d2f762d794267832a8445e6a8818a7ee59f14e4a902d

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