Malicious PDF — malware analysis report

Static analysis result for SHA-256 519996eeb1d118b6…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 07:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9bd3e551d39e081670deb9198753be1a SHA-1: c7c1f232a0c191313a4514d1ce0d849228c1e22f SHA-256: 519996eeb1d118b63d5fbefeabfbcea79261f247b733e19505fe77636d78f3e2
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=reading+comprehension+with+answer+ke'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious redirector URL and a benign-looking PDF link, suggesting a lure to external content. The primary intent appears to be redirecting users to malicious infrastructure.

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/wix?keyword=reading+comprehension+with+answer+ke In 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/1/0437/5642/1278/files/95617130654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/21948169431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugogesobiwem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/printed_leatherette_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/91067646675.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f1c45884a71143b18055d956689e6f83.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9d88e6aefc154d86af4391af79b3df07.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8e9cc5ab94c448da854a1bd4eeb2081d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/6491/2024/files/imperial_march_trumpet_sheet_music_easy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0298/5622/files/sound_of_silence_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/2014_jeep_cherokee_manual.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 2

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_off00005e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E68 5616 bytes
SHA-256: 32572d341ca0b13982abc80f8ba78ad73aef3e52f6760eca7c29c768a94b5b59
font_01_sfnt_off00007166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7166 10368 bytes
SHA-256: 777352a8305bfe6c939d6bd4ae1331bcd3e812add1c58ff981c184bea5386294

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