Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1daba2ce6c3435…

MALICIOUS

PDF

49.3 KB Created: 2020-10-25 10:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a59a81378067daa41f91c47178a7c814 SHA-1: a869e3b179687194a8fefaaa2b70bbde756d37a2 SHA-256: fd1daba2ce6c3435a4a08d2af9af14a2899d58d61144070f67617b105cb21031
194 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.
  • 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.link/aws?keyword=al+ayyam+taha+hussein+pdf In PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/dedarebuvutupe.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/bitopaweruxivel.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/7de389f3c.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/c925585b14772f.pdfIn PDF document text
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/xoraj-worinukik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8c86c6635b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5f92067b71085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f9227674b49e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5f939cf3ecfd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f8fd6dbd1d36.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000813a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000813a.bin)
    • https://cdn.shopify.com/s/files/1/0481/4156/6105/files/xevevokafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1139/2167/files/61228541906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/xevezudejimazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/corona_renderer_tutorial_3ds_max.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2664/7709/files/how_to_use_ophcrack_kali_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/71784355345.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/fekotazuk.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/studietrust_bursary_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/hanuman_chalisa_lyrics_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b9f8fc3-8518-4d58-9518-f24279b7aba7/ponilugukapitev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5447e65d-4633-4b8d-8da6-91575e03bc5d/nogabubopesumomixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01cf7219-458c-45c2-8e3a-89fc46faf450/kenomumezivitari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/558f8142-29d1-42f4-a615-7222e9c848dc/john_deere_955_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f8d518e-baaa-42b2-af96-fc1ddaec4fdc/55004469759.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/ccie_wireless_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/votoxunamoroxa.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/75724591290.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/gastroenteritis_in_pediatrics.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_off0000813a.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000813a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813A 5276 bytes
SHA-256: 315d0b82abd82f27780b2b141cb99fab499239ac2d51586cefb1e0d586c57425
font_01_sfnt_off00009315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9315 10736 bytes
SHA-256: eea2fc575df2ae4925bb32b1be27136768e6ecbfe89544d1ec79c8d88f749c3d