Malicious PDF — malware analysis report

Static analysis result for SHA-256 185479c8bbba24e8…

MALICIOUS

PDF

43.4 KB Created: 2020-08-20 21:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c63e2165ff4204f5ae3ebd100a8c6a7 SHA-1: 66f209a346f6c86a0514fd0a0b4284364ea00a2d SHA-256: 185479c8bbba24e89f49a2d03306a07fc58d15020f38216a7aa31a8ea28f0e1b
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL identified is https://ttraff.ru/pify?keyword=bangla+cartoon+3gp+mp4, which is flagged as malicious. The document body contains garbled text but also repeats the malicious URL, suggesting an attempt to disguise or obfuscate the malicious intent. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lead users to harmful content.

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=bangla+cartoon+3gp+mp4 In PDF document text
    • http://files.cassieabate.com/uploads/1/3/0/7/130739247/2171387.pdfIn PDF document text
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdfIn PDF document text
    • http://files.forestecotherapy.com/uploads/1/3/0/7/130739593/32f52a90bb3.pdfIn PDF document text
    • http://files.jyothischool.com/uploads/1/3/2/8/132815916/bavaziw_lipeb_fapegumazepu.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/1/0438/5862/4672/files/2000220836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/famuwizewavovidolupam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/92908888411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/kavujelawofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/gapowunuvuxor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/western_civilization_spielvogel_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/bicolano_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5688/2086/files/zinuf.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A34 5376 bytes
SHA-256: db173acc1c24edccdcabb71139952fe88bb5d54709840e5ce3a99c043be87725
font_01_sfnt_off00005c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C68 5860 bytes
SHA-256: 7f767c63b5309d1eec249a4bd58ad07fdb9634b6e96d47b2e345005f0f093a82
font_02_sfnt_off00006f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F85 2712 bytes
SHA-256: fe8cfb22695aadcef6326fd4c54d21323913fade470c5a72c963db4c699073d5
font_03_sfnt_off00007b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B46 10400 bytes
SHA-256: 39d0f5b064b88396ec7fe70f160c9d7baf387af11e4ae2df564ca6cf3ff96048