Malicious PDF — malware analysis report

Static analysis result for SHA-256 42cf856b7cae738e…

MALICIOUS

PDF

77.4 KB Created: 2020-08-09 09:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b1dcd6f8a1f31f4cb954e7b40db3e17 SHA-1: ef95b49de6a330e0adbce7fa04cfe904a1ea94bb SHA-256: 42cf856b7cae738efdac8d2f921916bd5f22debd6086dd2d9029903139eac45a
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, disguised as a downloadable project file. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to spread malicious content. The embedded URL is the primary indicator of malicious intent, leading to a redirector.

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=project+on+alternating+current+for+class+12+pdf In PDF document text
    • http://files.mymesedesigns.com/uploads/1/3/0/8/130814078/batusudukuno.pdfIn PDF document text
    • http://files.josephdeansdesign.com/uploads/1/3/1/3/131380495/4379039.pdfIn PDF document text
    • http://files.physiotherapymart.com/uploads/1/3/1/3/131398135/didajotiwupamikuduta.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/1/0432/1342/2753/files/36676995422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6655/5557/files/daturatokigemijefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/fixagapukigotoxeviwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4283/0496/files/bromate_determination_in_bread.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1895/6448/files/story_of_davidito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/48223058212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0541/9418/files/fotarokegodugifosesezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5000/0791/files/42943956616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2798/8634/files/zopizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/31935062805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/43191702589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5432/4117/files/nadefodakakemolagulavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4563/3693/files/dreams_from_my_father_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C1 5584 bytes
SHA-256: ed74d0296e93f5475075fa8bcb8168cdf9fbe8a1c06ae2e221e29188e7179b56
font_01_sfnt_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 12240 bytes
SHA-256: ad916df3f01ff28a2b18ed7fe4b0165718a2f68a48ed3435a312f46436427938
font_02_sfnt_off0001134c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134C 16036 bytes
SHA-256: bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17