Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f1f17de3924f43…

MALICIOUS

PDF

34.6 KB Created: 2020-08-19 01:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1606dfefbfca2fbbbc5b24e3ab46660 SHA-1: d9ef60c23fc9f74f522b2dd3b4327d3040de61cc SHA-256: c5f1f17de3924f43c04612efed1cb88aab3da838e1df0c4ce86ed3a66d7d6bde
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one prominent link redirecting to a known malicious infrastructure at 'https://ttraff.ru/pify?keyword=subject+pronouns+and+the+verb+ser+worksheet'. This redirector is part of a link farm designed to lure users with seemingly benign document titles. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms the intent to lead users to harmful content.

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=subject+pronouns+and+the+verb+ser+worksheet In PDF document text
    • http://jaradoba.richmondinfo.net/uploads/1/3/1/6/131606349/8224255.pdfIn PDF document text
    • http://kotapeg.melgough.com/uploads/1/3/0/7/130776046/3e354348046.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/1/0429/1647/9132/files/movezuwagezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3538/9086/files/41931704603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/saxatorovubuvoniremesiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/palobiletewar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/5th_grade_math_curriculum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/mechanical_vibrations_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/cysa_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/tewezexizapivepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0506/6913/files/votesorugamagig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6965/3663/files/gigejonifolure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0430/5303/files/amma_kavithai_in_tamil.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_off00004880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4880 5664 bytes
SHA-256: 156fe261cef56cb88efcfadd6e612a0a20ff39bde5a88b03cb2007aacd009722
font_01_sfnt_off00005bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC8 9940 bytes
SHA-256: 396795e2803675ff3fec33f0757aa2b92f26bfb7075213e4744c583b08d4d5f4

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