Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d250819a932546…

MALICIOUS

PDF

43.7 KB Created: 2020-08-07 20:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfe4b6e38d223ef40b4ba36d2cbfb8a6 SHA-1: 54d1089b6d56488e57f60ce343bbdf35c7b03ee8 SHA-256: 34d250819a932546f3413536f6b36286eb10f85233923b9d3385ce9c28079271
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=anemia+y+tipos+de+anemia+pdf'. This suggests a link farm or redirection strategy rather than direct content delivery. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=anemia+y+tipos+de+anemia+pdf
    • http://files.romainewashington.com/uploads/1/3/1/8/131857193/ropodefi.pdf
    • http://files.wadokaisouthwest.com/uploads/1/3/0/8/130874205/2922314.pdf
    • http://files.sweatandflow.com/uploads/1/3/0/7/130739814/c0018c144.pdf
    • http://files.jtwestbands.com/uploads/1/3/1/3/131379443/974375.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/virtual_villagers_5_new_believers.pdf
    • https://cdn.shopify.com/s/files/1/0429/1765/8780/files/oxford_dictionary_of_accounting_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/68641895518.pdf
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/banefixe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/bamawikoxanupusugovuse.pdf
    • https://cdn.shopify.com/s/files/1/0440/3567/0166/files/business_law_book_for_mba.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/heartsaver_cpr_aed_student_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0451/3467/6133/files/html_to_library_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/the_curious_case_of_benjamin_button_story.pdf
    • https://cdn.shopify.com/s/files/1/0443/8360/0806/files/commonwealth_of_independent_states.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/70707883740.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_off00006ec9.bin
9dd914f02e2a0cccb0acbe210ec7ee528670ddb47625ba249179f801cbb4d276
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC9 5148 bytes
font_01_sfnt_off00008049.bin
9d7cb467bdab86c09f712351b310e85c4884dd2b9128aa49fee96b22d19bf717
pdf-font-stream PDF embedded font (sfnt) at offset 0x8049 9908 bytes