Malicious PDF — malware analysis report

Static analysis result for SHA-256 86444a70aec156d5…

MALICIOUS

PDF

44.1 KB Created: 2020-08-25 14:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a696304f1a4892c379a9a5d9f2f4a4f6 SHA-1: 57b34f6ea70310471d8398b540c70da6e6612ce1 SHA-256: 86444a70aec156d5b71276d93fe30de8400c900f09f763783ecf3e8b97b80e8b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into clicking it for a supposed download. The ML classifier also strongly indicated maliciousness.

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=cities+skylines+guide+ps4 In PDF document text
    • http://files.wellingtonstreetartgallery.ca/uploads/1/3/1/3/131379246/ronenawulilelugow.pdfIn PDF document text
    • http://files.maiawellnessstudio.com/uploads/1/3/0/8/130814788/lafikewatub.pdfIn PDF document text
    • http://lumaw.annewalkerjewelry.com/uploads/1/3/1/4/131406082/4431840.pdfIn PDF document text
    • http://tewov.aatp-mysterygames.com/uploads/1/3/0/8/130814347/27e981b01ec15.pdfIn PDF document text
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.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/1/0450/9663/2472/files/ski_arlberg_piste_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/marazirexisoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52876055892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0343/6446/files/81345746347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/imagenomic_free_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7991/6963/files/dujezekagosufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/gudutenot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88490435411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/togugemopin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/challenges_of_ecotourism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9983/1966/files/ct_bng_foxit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/ancestry_gedcom_format.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_off00006ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA4 4980 bytes
SHA-256: 35eed636fd5235b9d80bf4f7a1559897dc2c95f55f5806890a048fd3fc819a8a
font_01_sfnt_off00007dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBC 11020 bytes
SHA-256: 26bbb18663da8bc53c635071ecf0fcf10c10679c68afeabacf6e52ecd4cf59f9

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