Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f08cf5dcc9dc4c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-23 14:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 060ba95c1839565a4916813e00e6fcd5 SHA-1: 3696ca0c29787786f3343e637bc8b2f02fea09c7 SHA-256: 04f08cf5dcc9dc4cf7b51d18d77dc922224002b7722e22d784ff68e6a8e75095
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector URL that promises free credits for 'Badoo', a social networking app, indicating a phishing or scam lure. The PDF also hosts a large number of other PDF files, suggesting it is part of a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=badoo+free+credits+hack+android
    • http://files.heidiloveshymns.com/uploads/1/3/2/3/132303151/dodugogezuvofe.pdf
    • http://files.commongroundonthehill.org/uploads/1/3/1/3/131379295/e182e2422bd.pdf
    • http://sinibe.tilicho.fr/uploads/1/3/0/7/130776886/gabov.pdf
    • http://files.moneytalkssummit.com/uploads/1/3/0/8/130814129/zotesomewu.pdf
    • http://files.aryabakesapie.com/uploads/1/3/1/4/131452950/295195.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/contact_form_7_us_states_dropdown.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/37097571853.pdf
    • https://cdn.shopify.com/s/files/1/0462/8722/4993/files/composite_functions_examples_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/ielts_academic_writing_task_2_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/namakonogomeku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/you_tube_usawatchdog._com.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006762.bin
3818cb4ca7c47b9ee4611f3ac9a9342a29e92939e8f80fe856faa532c5ad5dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6762 5192 bytes
font_01_sfnt_off00007901.bin
298747c65adfd017245a48b6f5ffa23007d0f14ebef3492cb1ba66c285c44baa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7901 10256 bytes