Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98822906ab5d6a8…

MALICIOUS

PDF

45.5 KB Created: 2020-10-16 13:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c5f5f71dce4513ac93aef188acdc17b3 SHA-1: 6080e24f17f212593e4b888ed1e715a9c4e6f6ab SHA-256: e98822906ab5d6a8e370520f414add07409b665a5d764df2be646341584fc795
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://gettraff.ru/123?keyword=spark+xmpp+client+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f8852f855377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f88d9b943943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f89215ff1a82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f8702012a0a8.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/3837160.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/xumowobe.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/1/0492/2871/0041/files/brave_boy_bdo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5547/5607/files/80726020781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0024/0541/files/download_pokemon_game_for_android_tablet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2722/7036/files/please_dont_say_you_love_me_cover.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9512/1301/files/ohare_airport_terminal_maps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2357/8789/files/8209292125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2378/9991/files/wuruzopipijadise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/desaxumaxaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f1a667e-616d-4c34-b180-d713eebb201f/42207349591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf66b94-0fb2-4fad-b820-cc489dca642e/55644153139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3924fe-5cc1-4eea-9ee9-e2c04c79ad9e/98439631423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68f067fd-e34f-48a5-a6f9-f02cb90eb265/2923167502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2b1289-b6f4-456f-8ee8-9823075bc6ab/62089160989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3389/8391/files/sociology_chapter_2_review_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8629/0335/files/11892987957.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_off00007158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7158 5276 bytes
SHA-256: 16f4edda38058f2a8d046b095ec5f5b422e1a8882d9d5b20ef0b23e1711b0f4f
font_01_sfnt_off00008329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8329 10864 bytes
SHA-256: a238e31bdc790426050ab38d9278fba51fa4c14ecc6735260e5c7fc11b570293