Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f16d203b6e3565…

MALICIOUS

PDF

49.1 KB Created: 2020-08-09 21:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 19d1eadf05439c7f40f10504a0ee92b2 SHA-1: 15e207db4330570fca9bd058bcfa4c4d69f4b300 SHA-256: b1f16d203b6e35655cdfe696978df3da2ea5763083e925fe056af8a20358d6cb
194 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'https://ttraff.ru/pify?keyword=agricultural+engineering+mcqs+pdf', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous external links, many pointing to Shopify domains, indicates a link farm strategy to obscure the malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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=agricultural+engineering+mcqs+pdf In PDF document text
    • http://files.jakekalender.com/uploads/1/3/0/8/130873987/ninatalekipifelolaj.pdfIn PDF document text
    • http://files.shopqal.com/uploads/1/3/0/8/130813732/445206.pdfIn PDF document text
    • http://files.alohavolleyball.com/uploads/1/3/2/8/132815298/9aba7f.pdfIn PDF document text
    • http://files.allisonmoody.net/uploads/1/3/1/6/131607063/lijemazarujiji-fupewowatuvuj-tiwatozad.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/1/0431/1737/9745/files/5518253578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/birape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/lezelosajij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4488/7966/files/kitchen_hygiene_and_sanitation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/micromedia_flash_professional_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2182/7222/files/retunulape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/rte_gujarat_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/bovuzuneworotekusijiminuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/wikixakatitosizudon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1321/8199/files/pikazimavemiwububexuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/mamixadidobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1406/0189/files/guitar_chords_tutorial.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 8

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_off000080c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C5 5588 bytes
SHA-256: 51be78aeda1ba6ae7f4d8712407cf65e9f06fa693e03e3e5811c88f1fb79e909
font_01_sfnt_off000093af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93AF 10312 bytes
SHA-256: a2425721b1a01d21714911f8982a3ac6505c909741d30d3e4d7860201e674d20

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