Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a8b1eaac463541…

MALICIOUS

PDF

45.1 KB Created: 2020-10-25 14:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d427ba25459f777b0005cd669b0497cf SHA-1: e828ecd9778de41fa8f4dec97aaca40e83ef4326 SHA-256: 81a8b1eaac463541f69309c1ed85d1cc68133fbb9a76a329e260fa82928389ad
184 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/pify?keyword=thule+roof+box+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5f922f2159aa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f8d7cc017635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_5f91e7bab39c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8a9528b6894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f8d8fe0a0a8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8a2062da1b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f881bf113808.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/mofep.pdfIn PDF document text
    • https://nurirekesuvakip.weebly.com/uploads/1/3/4/4/134404885/fabakegenunajike.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/5595048.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/e4b01f81fd70e.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000071ad.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000071ad.bin)
    • https://cdn.shopify.com/s/files/1/0484/6678/8506/files/social_networking_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3210/7937/files/77625149452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6480/9373/files/tekken_3_weebly.com_apk_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/54500105575.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/30532444325.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/begatare.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/59332988721.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/formelsammlung_bruchrechnen.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 extracted file (font_00_sfnt_off000071ad.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AD 4988 bytes
SHA-256: 80fee9bfd6fbd224609e7f730afd37d5f4422c3fa35d6d40aaa99a9c2f91f274
font_01_sfnt_off00008286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8286 11168 bytes
SHA-256: 65fe868f471c610a722f372dfa253f5866b518450edcf6ae1aac04995e68f2a0