Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c592f21552a659…

MALICIOUS

PDF

66.2 KB Created: 2020-08-28 03:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91efe76e20304eea8274fb13cdd20e64 SHA-1: 854a1bce8d7534fc2b970a2efbbd7c5112037330 SHA-256: f8c592f21552a659856db1380f9fa049270928cd7c3b2444023e8b67fe7af896
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains text related to 'Phet interactive simulations balancing chemical equations worksheet answers', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to improve SEO and distribute the malicious payload.

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.com/pify?keyword=phet+interactive+simulations+balancing+chemical+equations+worksheet+answers In PDF document text
    • http://files.lifecoachmaurita.com/uploads/1/3/0/8/130813448/jebugafemav_pobalovikirex_muvefawoga.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/1/0432/0726/2370/files/coolmoviez_hollywood_movies_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4414/9150/files/78559746128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/pesunogiketagizoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6374/4414/files/loss_on_inventory_write_down_balance_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8031/9130/files/logic_gates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1026/8068/files/98302259794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/28835136824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6010/9210/files/guild_wars_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/the_big_sleep_1978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4457/files/batozasavujaxifutererojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5083/3822/files/molotowo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A8 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off0000c3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A2 5696 bytes
SHA-256: ed8a2d905309da011147e19120ed004d0009552475fb5c201ad345f22e41d196
font_02_sfnt_off0000d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E5 10444 bytes
SHA-256: fe555e475e828fb277e17cd307c8b2855219a25c17647795cfeeb6964d530d26

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