Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6bc3e5be4f6de2…

MALICIOUS

PDF

37.0 KB Created: 2020-08-20 02:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aacbbfe6d76ccffe2f405e03b619bc5c SHA-1: e3642d741c7e5bb7afe1e2c61478e596e2502676 SHA-256: 8f6bc3e5be4f6de21653d24c032147a6e71d73e2ce30fc6dff2667a95c97798d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, a technique often used in SEO link farms to manipulate search engine rankings or to hide malicious links among many benign ones. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=flaws+and+all+sheet+music', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL and several benign Shopify URLs, suggesting a deliberate attempt to disguise the malicious intent.

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=flaws+and+all+sheet+music In PDF document text
    • http://dibaku.hannahbroderphoto.com/uploads/1/3/2/6/132696021/ad8429af27931e7.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/1/0430/3536/1442/files/30657203297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/12868287260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0620/3803/files/storyboarding_basics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2431/8618/files/adnoc_general_salary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/83435505317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0257/6286/files/41977834570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/zitasitif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5059/6512/files/comfort_zone_infrared_heater_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/camera_scanner_to_full_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4788/6743/files/19637400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9011/7543/files/sort_arraylist_alphabetically_in_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9944/2590/files/sovonivenukekamuxol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/gente_toxica_bernardo_stamateas_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/68803777805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/jodepogepagesobi.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 1

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_off0000535c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x535C 5132 bytes
SHA-256: e0fb7b7fda9c5915caf287ca8ba16a4a9efb5f088a8597fb9d7934328486e50b
font_01_sfnt_off000064b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B2 10100 bytes
SHA-256: a87e043644616c751f300486b5d1d4ec4915fe2b3170ed581bc4b49834372ef5

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