Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7e1fa23eb201e8…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 20:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f5d9c917dc90db29fbf989270f8587 SHA-1: e4b3b5a3ed9e1bdbbcf6e6a8248b0edc6829f62f SHA-256: bf7e1fa23eb201e851f5145c90422fc412bf02ce412c850869915f78abe96920
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify domains, suggesting a link farm for SEO manipulation or to host further malicious content. The primary attack vector appears to be social engineering through a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=the+acrobat+trombone+sheet+music+pdf
    • http://files.thelittleyellowbuilding.com/uploads/1/3/1/4/131453645/lapigigelujalig.pdf
    • http://files.emanuellutherandaycare.com/uploads/1/3/1/4/131483097/2894733.pdf
    • http://files.treasuredglances.com/uploads/1/3/1/6/131606208/winunipi_wufojisob_lotufexi.pdf
    • http://files.annemurrayartist.com/uploads/1/3/1/1/131164118/ximenotugazozug.pdf
    • http://daxipa.scentdepotwellington.com/uploads/1/3/1/4/131408899/tivukafis.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/biximoxiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/77391194128.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/3._5_dungeon_master_s_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/empirical_formula_worksheet_2_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/financial_enterprise_risk_management.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/lista_de_vocabulario_em_ingles_com_traduo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/dipefusulemoseseje.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3186/files/vuzof.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/cambridge_english_empower_c1_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/mapumaxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2257/1930/files/pamirukasi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5074/5512/files/earthquake_resistant_building_construction_file.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_off000053ba.bin
1aca2660b5c6bce61ea423c55d5e9d57f7f90f14c272818ac94f6c24d696cd8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x53BA 5452 bytes
font_01_sfnt_off00006610.bin
c1263f0327744ea5b48e5ccc7ce8da61d327ffef35da81ad555159ac8bc377e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 15976 bytes