Malicious PDF — malware analysis report

Static analysis result for SHA-256 d813db8cd33d30e9…

MALICIOUS

PDF

37.6 KB Created: 2020-08-22 12:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 323a8723f956f43214c3a44bd05b7f5e SHA-1: 38842489ac589f0560b9b2ccf7e82b5356e2bf0d SHA-256: d813db8cd33d30e9072ac2b9f7c85d23128032e88ac90e5e1c653f294c2a708d
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, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body itself is heavily obfuscated but contains the same redirector URL and a large number of benign-looking Shopify URLs, suggesting a link farm designed to obscure the malicious destination. 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.cc/pify?keyword=carpentry+class+worksheets In PDF document text
    • http://guzuga.battlebeyondearth.com/uploads/1/3/0/7/130775455/pewovitujaf.pdfIn PDF document text
    • http://files.aap7v7.com/uploads/1/3/1/4/131453051/famunabir_gomizaza.pdfIn PDF document text
    • http://lopemad.lauren-roseking.com/uploads/1/3/1/0/131070847/320562a.pdfIn PDF document text
    • http://files.bestiesbiscuits.com/uploads/1/3/1/3/131383380/4660e7dd6.pdfIn PDF document text
    • http://mujobomax.mccormickcounseling.com/uploads/1/3/1/0/131070702/sukoxuzez_lurorapezipus.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/1/0433/1972/2152/files/comfort_glow_heater_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/perforated_sheet_panel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/bopuzebesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/59196578163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7053/8406/files/business_english_audio_lessons_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8812/files/student_exploration_mineral_identification_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/duzefitatutokad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4188/1253/files/28985517261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/60390158236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9408/8616/files/clash_of_clans_hack_online_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2456/4902/files/behaviorally_anchored_rating_scale.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_off000052fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52FE 5184 bytes
SHA-256: 53eec3d46c92d1a720749c3c5b7a9283b5844c243f5c7c269293460659b231a5
font_01_sfnt_off000064b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B4 10532 bytes
SHA-256: 53f2de51a84bd221b319d0b0a1ae4c6e8058ed45463da5bc20eef31a3d1574df

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