Malicious PDF — malware analysis report

Static analysis result for SHA-256 458ce28fe3f78089…

MALICIOUS

PDF

35.0 KB Created: 2020-08-21 22:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8fe1d56df998abae62eb5401f49f4fc SHA-1: 57200eda541eb5e9caac0be8ce6ebe2d11a03703 SHA-256: 458ce28fe3f7808929fc4622f709bde6b55ba15ebc938ca746f0f785f2e214f2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning model and contains a large number of embedded links, many of which point to potentially malicious redirectors or spam content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bomberman+nes+apk. The document body contains garbled text along with several URLs, suggesting an attempt to obscure the malicious intent. The presence of numerous links indicates a link farm or redirection strategy to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=bomberman+nes+apk
    • http://mukipaga.bagaducechorale.org/uploads/1/3/1/3/131383613/raloxojijadu_magejonedotede_limorepuruzubut_mamokiduleke.pdf
    • http://files.shrisheri.com/uploads/1/3/1/4/131482931/zikufovebavu-fidiwu-baxuj.pdf
    • http://files.visualheritageproject.org/uploads/1/3/1/4/131453539/7956f.pdf
    • http://kasudoj.danniles.com/uploads/1/3/0/7/130775734/xifukewejunoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/new_headway_beginner_third_edition_teacher_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/jugetuzum.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/sugaribano.pdf
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/krause_and_becker.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/52372739088.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/letter_n_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/60500487515.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/75463675827.pdf
    • https://cdn.shopify.com/s/files/1/0440/7007/6566/files/13438560372.pdf
    • https://cdn.shopify.com/s/files/1/0430/6852/2657/files/small_scale_aquaculture_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/wurapipoxag.pdf
    • https://cdn.shopify.com/s/files/1/0430/8313/7178/files/biology_in_focus_campbell_2nd_edition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a3c.bin
c631d923b09f3cb4a27f5ffe3ce8987c25b0245300dea01f6c5c8910c0ddb7b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3C 5184 bytes
font_01_sfnt_off00005bbd.bin
da4e689b85bfee206e3b397f15afc18d8322e63bc96cebca57b07a434b2667ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBD 11148 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.