Malicious PDF — malware analysis report

Static analysis result for SHA-256 9862335f0399ce35…

MALICIOUS

PDF

49.9 KB Created: 2020-08-05 06:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cac0f10b6398d0c5c6dc7dca20337073 SHA-1: c370fe7162d238a368ebb6f3f44c3c73cd021afb SHA-256: 9862335f0399ce35fc389725d111f84ae7a9e04691c94a138504468f4eeda374
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique known as a link farm, designed to obscure the ultimate destination. One of the primary links, 'https://ttraff.ru/pify?keyword=6th+grade+science+reading+comprehension+worksheets+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to worksheets and URLs, suggesting a lure to trick users into clicking malicious links.

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=6th+grade+science+reading+comprehension+worksheets+pdf In PDF document text
    • http://files.missionpriests.com/uploads/1/3/1/4/131452783/barure.pdfIn PDF document text
    • http://files.aycliffe.net/uploads/1/3/0/7/130775441/mopikumuzefewu.pdfIn PDF document text
    • http://files.kencarder.com/uploads/1/3/1/8/131871704/9606093.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/1/0429/5573/5203/files/59683779568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/papirulukejawukegomipomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/90579910057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/mosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/dolit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/pulugonenewizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0115/1651/files/zikanas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9208/6685/files/bncc_ciencias_naturais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/xusezitifupas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/bobcat_610_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8784/5790/files/a_psalm_of_life.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 5

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_off000083e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 5752 bytes
SHA-256: e53e7dff7e3b4586cf3c3a71e93588c173181de6cabd8664a7ab338cdb75903c
font_01_sfnt_off00009760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9760 10284 bytes
SHA-256: 63a8ed4a5eeb2a3d55c3297f2529c03ec9250cca7f18d7e107a23c8230b96f80

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