Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e284b1ffcda46b…

MALICIOUS

PDF

34.9 KB Created: 2020-08-21 22:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b8f5edc5d7608060f4ed1f8a8c46e4d SHA-1: 0a62484236c8e78a19397fda68d89851c2552893 SHA-256: 52e284b1ffcda46bec6db92cd5a96798693db0aceb561dda67d01b0d348a5517
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service (ttraff.ru) known to host malicious content. The document body itself is heavily obfuscated and appears to contain embedded URLs, including the malicious redirector and a link to a PDF hosted on cdn.shopify.com. This indicates a likely attempt to lure users to malicious sites through a link farm, potentially for phishing or malware delivery.

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=adverb+word+search+pdf In PDF document text
    • http://files.vonsmartexercise.com/uploads/1/3/2/7/132740361/d4d93eb8b44af1.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/1/0433/5170/3706/files/psc_exam_calendar_october_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/blue_planet_project_book_lost_chapters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/blade_runner_unicorn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2529/1674/files/81757867097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/88900832206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/8184574094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4408/files/43804163303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/67969906595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/tent_card_word_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/tudodiwofepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/15362854231.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
🗂 Part of campaign: vonsmartexercise.com 3 samples

Related samples 4

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_off00004b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B08 5492 bytes
SHA-256: 970df5cefa791132057b693f6c1db870c1de9bb63a26f47522b1d660c46e9fde
font_01_sfnt_off00005dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBA 9752 bytes
SHA-256: 8387cceb530c87e8089e78116e51cc080a894c99d0f8c42e119373db2e51914c

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