Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea913488205e592…

MALICIOUS

PDF

44.7 KB Created: 2020-08-06 07:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b27a64d51871c7b1be2d6ce8f13f6ab3 SHA-1: 341e24ae7e88aba4642aff617d6a23c719e39456 SHA-256: fea913488205e59254f7252713818683c203822f50dacc9ab4bc8af155edff02
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly supports the malicious nature of this PDF.

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=el+negocio+de+bienes+ra%25C3%25ADces+en+m%25C3%25A9xico+pdf In PDF document text
    • http://files.goodshepherdinoshkosh.com/uploads/1/3/0/7/130776276/6658535.pdfIn PDF document text
    • http://files.beckleyareaderbydames.com/uploads/1/3/0/7/130775982/abbedc9.pdfIn PDF document text
    • http://files.hannahhicksart.com/uploads/1/3/1/4/131406348/3699403.pdfIn PDF document text
    • http://files.polebites.com/uploads/1/3/1/4/131483235/wivulufap-furun.pdfIn PDF document text
    • http://files.joannasholistictreatmentclinic.com/uploads/1/3/1/1/131163914/tazigusod_tavumudarofap_maruvejeri.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/1/0436/2534/9283/files/71860264448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/77424916687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/99252980408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/jevuraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/19096302334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/2nd_law_of_thermodynamics_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4974/1464/files/capitalism_without_capital_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/23507168760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0088/8483/files/6757496571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/24761278840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/36286705145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/tien_len_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/perkys_calling_instrumental.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/50682835047.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6939 5836 bytes
SHA-256: 75fe73a9668c3a56478586af6b00c8e72479e4e2648427b0bc5fc7cc466f14f1
font_01_sfnt_off00007cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB9 11832 bytes
SHA-256: 78381b7eb27f8686b8685b56e6585bc3285836c09a4779bc0a547ec4cba56e8e