Malicious PDF — malware analysis report

Static analysis result for SHA-256 8448307dfa439204…

MALICIOUS

PDF

46.7 KB Created: 2020-08-10 06:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c9f35a0ec346b2b0d2cff5413e715f94 SHA-1: cd9649338521c98c56da78392b39637969a15fbc SHA-256: 8448307dfa439204813e19404bd3c77688a853bf8e8236c91cb4097ceef4314a
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, indicating a link farm or phishing attempt. The primary redirector URL is identified as malicious. The document body, though obfuscated, contains the same redirector URL and benign-looking PDF titles, suggesting a lure for free content that ultimately leads to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=angulos+inscritos+en+una+circunferencia+ejercicios+resueltos+pdf In PDF document text
    • http://files.ku-iraqueer.org/uploads/1/3/1/4/131437056/vaderirixum_pixigozulinu_sekivujeb_tedevaxovilat.pdfIn PDF document text
    • http://files.blancheguernsey.com/uploads/1/3/0/8/130813557/guvadafozokobakakisu.pdfIn PDF document text
    • http://files.wallaceclassroom.com/uploads/1/3/0/7/130775760/e814df96db85.pdfIn PDF document text
    • http://vixupo.lagunaniguelcarpetcleaning.net/uploads/1/3/0/9/130969772/4070969.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0429/1375/9395/files/4370719436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/75167321193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/microelectronic_circuits_7th_edition_solutions_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/64747695417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/78255094166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1543/0559/files/gobudefoxifoxin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1787/5110/files/bronkopneumonia_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/56189448888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/rikebuzebifupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/nerukobufazubaruvurasurax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/foxoruwozepinevoru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 2208 bytes
SHA-256: 5cbedcda38578e3de563c3337e923fa6734d4cc2cd8e6155bcf395d6c53fc43e
font_01_sfnt_off00006a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 5388 bytes
SHA-256: 102a73c33513f75b3a2f3eb36a2dbeabc4ae27f0faa6cae143a262648fd8bfa9
font_02_sfnt_off00007cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF5 14960 bytes
SHA-256: 65c67d971d9361574cd9a75382beb3a21098bb4f4dbe7a25495ef0228bd1a817