Malicious PDF — malware analysis report

Static analysis result for SHA-256 84151d5848bcf5e3…

MALICIOUS

PDF

42.8 KB Created: 2020-10-16 03:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a4b3414a5ba076ca46158adb03d4853b SHA-1: 6183e530125bfd906f76e0291ad629ad0c3ca6c5 SHA-256: 84151d5848bcf5e356b0f105cf3bf966102b25451771eae16cfd375f72345254
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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=android+auto+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f88c34743378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f88bad7b5cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f872e0b536f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8829fed16dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f875336b309c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f88bebc3786a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f8732512efad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f88013102035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f8880d18d4d7.pdfIn PDF document text
    • https://site-1044310.mozfiles.com/files/1044310/fepumezegupak.pdfIn PDF document text
    • https://site-1038782.mozfiles.com/files/1038782/3400152562.pdfIn PDF document text
    • https://site-1039188.mozfiles.com/files/1039188/islamic_stock_market.pdfIn PDF document text
    • https://site-1042501.mozfiles.com/files/1042501/kikuwakawepatuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f875bebd7421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f87644332fa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f8750088aa4d.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/1/0431/5509/5712/files/college_prep_genius_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6122/2307/files/45113286005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4535/5157/files/jixetovezekilemoperadarof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8841/5394/files/76083046617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4174/5814/files/80884458087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7308/0996/files/2_step_launch_control_diesel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7112/7206/files/3175087558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0143/6569/files/44627769817.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_off000069da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DA 4920 bytes
SHA-256: 85a3c95147d70d98d70a5289fcd534f617d52028bff0a1b0aaa85125dd078cd3
font_01_sfnt_off00007ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB4 10464 bytes
SHA-256: fd8913f1f8ba1618ca7828e2d4929e95805c64403ad970311757b6f22ba9c584