Malicious PDF — malware analysis report

Static analysis result for SHA-256 8256a5301c62e23b…

MALICIOUS

PDF

52.3 KB Created: 2020-07-28 23:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 910e1464f8f9ea66084a0affeba371db SHA-1: f4dc12054d601e27acff559704bf40fdbd4fae76 SHA-256: 8256a5301c62e23b689b2e5480f088b45b88e68dfdb077d824f90fa31b3ef0e4
194 Risk Score

Malware Insights

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

The PDF contains a high number of links to external resources, many of which point to a redirector URL. The ML classifier strongly indicates maliciousness. The primary redirector URL is used to disguise the true intent, likely leading to a phishing page or malware download.

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.cc/pify?keyword=writing+linear+equations+and+inequalities+worksheet In PDF document text
    • http://files.ephphathaministries.com/uploads/1/3/0/7/130739835/4d2b2a62.pdfIn PDF document text
    • http://files.brazilianhairandbeauty.com/uploads/1/3/0/9/130969332/kidikov.pdfIn PDF document text
    • http://files.c-eggert.com/uploads/1/3/1/3/131398333/bojuxadijujunilob.pdfIn PDF document text
    • http://files.intensifyyoursport.com/uploads/1/3/0/7/130776509/4aca46d2e9b34.pdfIn PDF document text
    • http://files.stephanieclayman.com/uploads/1/3/0/7/130738752/5645462.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/1/0429/6422/2101/files/90481050300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/saluxapofos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6978/2693/files/27047909863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3491/8568/files/74823127627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/41668269708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/mukurivozaxibegilotuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/mafuxoxuwojiripuvew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/362157335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/62874204798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8030/3263/files/difekeruraletifopupura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/30494272579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/gukajazesegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1348/0343/files/54897046836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/zogunosoved.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_off000070a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A8 5264 bytes
SHA-256: c48dfc753486a6fa6825b7ba6190483c322cf8e4f0d39a260974fad1b4d877ba
font_01_sfnt_off0000828f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828F 13524 bytes
SHA-256: 2dbf7cab6972d77fb2eb0a7de406c0dd989ec0d6350f80f923317935002027c8
font_02_sfnt_off0000ae1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1B 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67