Malicious PDF — malware analysis report

Static analysis result for SHA-256 941aecbee9506fc6…

MALICIOUS

PDF

63.7 KB Created: 2020-10-31 03:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 2721553e5d0b90c412bc8ebde9b94afd SHA-1: 768bc110396f57b74e8a7fa2c33ab78912547c85 SHA-256: 941aecbee9506fc6fa1845587af369fcc901a2eb93c870f6b4b381de11df8e56
194 Risk Score

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://gettraff.ru/wb?keyword=6th%20grade%20math%20common%20core%20standards%20worksheets In PDF document text
    • https://bipinutafo.weebly.com/uploads/1/3/4/3/134358532/a87ae.pdfIn PDF document text
    • https://jepirozo.weebly.com/uploads/1/3/4/4/134474462/5106516.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/1/0508/1032/3127/files/cub_scout_bear_requirements_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/0884/9582/files/25755018624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8fca85-a64e-4467-89df-5d7fa46880ab/buzizewapevinimotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2136/7961/files/fahrenheit_451_study_guide_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4922/9722/files/kogowup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6747/1538/files/butterflies_of_arizona_a_photographic_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af0e62f-1010-47ce-a541-c08d12941c14/92880907588.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/secrets_of_the_temple_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/28082125387.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/24791939829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37bffcb-6512-46d8-9341-a3db9228065a/my_time_at_portia_igneous_rock.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7808/2495/files/android_checkbox_onchange_listener.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6713/6407/files/show_connected_wifi_password_android.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC42 5276 bytes
SHA-256: 176bb89c5fc85b87eef681dce730c957170954292f8e1fc377a0c1c33f89534f
font_01_sfnt_off0000be0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0E 11056 bytes
SHA-256: f278b3f20a51880d5698381086693ef37c51a71ce771c2ea75d341f04656e7f0
font_02_sfnt_off0000e3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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