Malicious PDF — malware analysis report

Static analysis result for SHA-256 6857a68a9bd37e59…

MALICIOUS

PDF

40.6 KB Created: 2020-08-10 13:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e82d57ddea700d4ebde3de3099878b17 SHA-1: 82123adfe25d6851a4221f49752bfa07d976495e SHA-256: 6857a68a9bd37e59e7807edba6bd57c94ca9ba555df5828fb3172bd76200b110
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links designed to appear as legitimate downloads, but they redirect to malicious infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=laboratory+apparatus+and+their+uses+worksheet+pdf, which is flagged as malicious. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a link farm or SEO manipulation tactic to distribute malware.

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=laboratory+apparatus+and+their+uses+worksheet+pdf In PDF document text
    • http://files.amsp.net/uploads/1/3/1/8/131856166/3f7a1.pdfIn PDF document text
    • http://files.sunriseonlinecourses.com/uploads/1/3/1/3/131383330/zuganopazigeta.pdfIn PDF document text
    • http://xixonumij.thesacredyes.com/uploads/1/3/1/3/131380005/zusokufemetoxizu.pdfIn PDF document text
    • http://files.hairbyhkt.com/uploads/1/3/0/7/130776594/vulavimudepikas_sewidaf_xezawuj.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/1/0428/9835/8432/files/74832969368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/jadaxabubawojozimoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3571/3958/files/15760874946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1476/1120/files/signed_binary_numbers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/belexerafotofiroseralan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/livro_agrometeorologia_dos_cultivos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/3762909362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81143567733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/27824424186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/denatured_alcohol_sds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/37952025461.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 7

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_off000060cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CD 5436 bytes
SHA-256: 1ce4cecebf93f581d1dd1db5f646a6d25afa6ed0df9d46df1301a96fae3d40d1
font_01_sfnt_off0000734f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734F 9908 bytes
SHA-256: 1ad5a08180f2728ebad86358cca8bd4e47a5ee3b3881ea5523ac74619290b0c8

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