Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6005b99bbef5a2…

MALICIOUS

PDF

57.6 KB Created: 2020-08-07 04:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d82b55fad6a4b315dff18db09f1d8bd2 SHA-1: 33940e4999c619bfce8a906ef9c4914b82fb3e8c SHA-256: de6005b99bbef5a2cb1610a8fc1256e72095f3f8b8fd95f191c422c835e1f8a5
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to a known malicious redirector. The document body, though partially corrupted, contains text related to file downloads and includes the malicious redirector URL. This suggests the PDF is designed to trick users into visiting the redirector, likely leading to further malicious activity.

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=integration+formula+pdf+file+download In PDF document text
    • http://files.hattrick3c.com/uploads/1/3/0/7/130776648/fukidovividuzejuve.pdfIn PDF document text
    • http://files.andrewfcartertraining.com/uploads/1/3/1/6/131606758/79d6d1.pdfIn PDF document text
    • http://files.rammrcclub.net/uploads/1/3/1/0/131069961/9368020.pdfIn PDF document text
    • http://files.basdelemstrings.com/uploads/1/3/2/6/132682327/bisakosoti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5512/8477/files/23604169330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/niwoxiwakowugen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/pirejusatosatolotem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/fundamentals_of_applied_electromagnetics_ulaby.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/sobewubovugipij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6536/6933/files/knight_s_sword_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6189/8390/files/leaflet_jantung_koroner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/33267784075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/buboronadakazekono.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 5212 bytes
SHA-256: d9571139ff8a1abd8314ea41e07eea3f4dc54e306663ca8c0f62a18da99d631a
font_01_sfnt_off00006f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F82 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00007ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE6 15224 bytes
SHA-256: 8a1bbb790cee7d65978163c1a73c1a5f9c896d6d4f1a138faefdfc8a77eabe74
font_03_sfnt_off0000aa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA79 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
font_04_sfnt_off0000bf1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1F 7492 bytes
SHA-256: e4e9f51daf47f7db59bff9e83eff651305e3fdc6c063b1cb2622371475fbbc5a