Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd5059e68de0539…

MALICIOUS

PDF

46.9 KB Created: 2020-09-03 01:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4cce3a5b03c69f8834c1c2fac0cea1b SHA-1: 21680e19b45e02db635bddc3455626836be8825b SHA-256: bcd5059e68de05395fc20d8581f75051ec10e0d9cdf32d552aef4e9dfa6a6f32
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a prominent link to a redirector URL, which is flagged as malicious. The document body also contains the same URL and a list of other URLs hosted on Shopify, likely to appear legitimate. The ML classifier strongly indicates maliciousness. The primary attack pattern involves social engineering through a lure related to 'Bollywood new movie' to entice users to click the malicious redirector.

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.link/wix?keyword=bollywood+new+movie
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/ririsa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6928/files/jspdf_page_break_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4722/files/aruba_controller_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/articulacin_rodilla.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19194700937.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/xugibizasilekijamelejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/zosevekexax.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/mupijigokewezekigubalunad.pdf
    • https://cdn.shopify.com/s/files/1/0433/6962/7799/files/free_download_english_to_marathi_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1205/files/tiwiv.pdf
    • https://cdn.shopify.com/s/files/1/0447/8251/8421/files/23187006399.pdf
    • https://cdn.shopify.com/s/files/1/0438/8628/0872/files/gumaluzudusofifuzagepa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4802/6780/files/appreciation_letter_to_employees_for_outstanding_performance.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/logical_reasoning_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/7027/3174/files/c_sudoku_game.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_off00007ac0.bin
cadd324b764824888dd5dc079bc7348dacd3ec111d0080e0194bd946988f45bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC0 4792 bytes
font_01_sfnt_off00008b1a.bin
b5d46a8e56da82aec453290bc6b2df4bfd9ac0f46d2793a476551101a441580d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1A 10492 bytes