Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc10f44f1cdac0fe…

MALICIOUS

PDF

48.3 KB Created: 2020-08-21 04:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 809d5974faf6db03a2b4c8ed4b7a6753 SHA-1: ea11823b1d52df5016e912e614a3923f8d23952c SHA-256: dc10f44f1cdac0fe85ef3b20c24bb434ed5a744e2af3bd648291523d9641c731
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the same malicious URL. The presence of a link farm heuristic further suggests an attempt to manipulate search engine results or distribute malicious content through numerous seemingly legitimate-looking PDF files hosted on platforms like Shopify. The primary malicious URL is https://ttraff.ru/pify?keyword=color+by+number+addition+worksheets+for+kindergarten.

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=color+by+number+addition+worksheets+for+kindergarten In PDF document text
    • http://files.icollectablesonline.com/uploads/1/3/2/6/132682790/supojofirajoli.pdfIn PDF document text
    • http://gijavuro.totalbusinesswebsitesolutions.com/uploads/1/3/0/7/130739892/ziwimewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3536/8346/files/84830216790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/74823692351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/akreditasi_prodi_ban_pt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/virginia_state_inspection_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/small_letter_alphabet_tracing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4294/6728/files/gyrocopter_dota_2_guide_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/81197208673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7745/1428/files/console_commands_dragon_age_origins.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_off00006f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F84 5624 bytes
SHA-256: d897a8c5f2c7c46619bb0cb5f3cbd0f1e53c2602424fde720669ba8f1d659255
font_01_sfnt_off0000828b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828B 10352 bytes
SHA-256: 6a42e0c24da304ce720cb7535b3d4e6be686ac790d4253cf1d9bf58821d0e782
font_02_sfnt_off0000a5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F5 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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