Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc188c152ac43ace…

MALICIOUS

PDF

47.6 KB Created: 2020-08-22 18:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da34764f4576550528d418b8116b58d7 SHA-1: 85ea6bbe4ede17c31a36b0ebcefb254a2f9e9ea3 SHA-256: bc188c152ac43aceb595522b9b1ca010a980bd4af873728e19c95a38bebb2bbe
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to redirect users to malicious content. 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.com/pify?keyword=cadaver+synod+catholic+answers
    • http://giripa.logicalprepping.com/uploads/1/3/2/3/132302870/menofasoroti.pdf
    • http://ketovok.worldbaseballproject.com/uploads/1/3/0/9/130968973/zodusi.pdf
    • http://files.emilyknash.com/uploads/1/3/1/6/131637881/9f13e73a2242f.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/5752760376.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/68131070439.pdf
    • https://cdn.shopify.com/s/files/1/0430/0141/3795/files/how_to_use_multimeter_on_computer_motherboard.pdf
    • https://cdn.shopify.com/s/files/1/0462/7349/5200/files/new_headway_beginner_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/amidah_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/bauderflex_dna.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/30188414785.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaled.pdf
    • https://cdn.shopify.com/s/files/1/0448/3465/2321/files/51447895807.pdf
    • https://cdn.shopify.com/s/files/1/0451/0233/4104/files/synonyms_and_antonyms_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/xemaponijisanuduf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6448/3240/files/feviwepapoguvonugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8615/0816/files/bourne_supremacy_subtitles.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/convert_to_word_document_that_can_be_edited.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_off00007cd7.bin
efb25f8fc4e8ab4855b7f5907944f97c39938d23616e3d6278653b350c199074
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD7 5184 bytes
font_01_sfnt_off00008e88.bin
51d0f42e039281ee77461d9bbdf969ead1751ec4256d56abeac0949b57aa8f91
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E88 10140 bytes