Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f44397d83eed51…

MALICIOUS

PDF

59.0 KB Created: 2020-08-02 11:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c3c540058285762cecb040defdeeba2 SHA-1: ba42132d1924ca4b9ec38f6ad29d5c68be9a89cf SHA-256: 10f44397d83eed51d0c6e8383fadaad18c3ab087500505df606de7d3060a3f84
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to a redirector service, indicating a link farm or SEO manipulation tactic. The primary redirector URL is associated with malicious activity. The document body, though heavily obfuscated, contains the same redirector URL and references to PDF files, suggesting a phishing or malware distribution lure.

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=ubuntu+boot+partition+full In PDF document text
    • http://files.vanesanieri.com/uploads/1/3/1/3/131378921/b3615de15.pdfIn PDF document text
    • http://files.learninginafterschool.org/uploads/1/3/1/4/131410870/94ee1b.pdfIn PDF document text
    • http://files.adventurewithdiabetes.com/uploads/1/3/0/9/130969855/toxozovafadanirekope.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/1/0437/8660/0609/files/mimexutopezevusij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4563/3691/files/guwuferajawidenelez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/62791780219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/7515533387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2017/1936/files/goluvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/i_see_the_light_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/fusukowirojukonekod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4009/3846/files/bronze_tube_vanilla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8003/2160/files/nanabukofisamutoniginu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/kikojiletinaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9671/6952/files/jejotofobiruferovefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/voxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/vegebamemike.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9E 4848 bytes
SHA-256: b0094e9abb7fe27972faf6efaf2a00018fcef2f9a2ef1867b44f4a012f12f853
font_01_sfnt_off00008e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E26 2012 bytes
SHA-256: 6d2b430af3b20c3eb7b9cdbe4fe23f1ecf8e8f4cdb433abe44bf193babafd90f
font_02_sfnt_off00009782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9782 14588 bytes
SHA-256: fbb83253ecb97697235bfd584ee13264f4ef37ae24e18cc0487f5dd543576079
font_03_sfnt_off0000c608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC608 17072 bytes
SHA-256: c8ef3cc8a82a0c5ddc4d22feb1f9ceeba2dfc55397efe270e905bc1b2b04e141