Malicious PDF — malware analysis report

Static analysis result for SHA-256 362ae6204fac64df…

MALICIOUS

PDF

47.3 KB Created: 2020-08-11 00:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e36e9f2ff98fce012dcaa1d88320fc SHA-1: 07867c756b7ddd4a44f87df7c6f21cb7e267134b SHA-256: 362ae6204fac64dff6192360ce760e35cc6591a31ecf6059eecea20e631e40bd
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary heuristic identifying it as a PDF SEO link farm. One of the embedded URLs, 'https://ttraff.com/pify?keyword=que+es+el+hedonismo+pdf', is flagged as a malicious redirector. The document body itself is heavily obfuscated and contains references to 'wkhtmltopdf', suggesting it was generated programmatically. The overall purpose appears to be to manipulate search engine results through a large number of outbound links, with at least one link leading to malicious infrastructure.

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=que+es+el+hedonismo+pdf
    • http://files.theblackbasslodge.com/uploads/1/3/0/7/130738850/memimazukejowosa.pdf
    • http://files.wazany.com/uploads/1/3/1/6/131606875/gulibo_mogoga.pdf
    • http://files.flareperformance.com/uploads/1/3/2/7/132740845/kusamekavedusoz.pdf
    • http://files.christinestow.com/uploads/1/3/0/7/130775228/c94e79700428b21.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/tujez.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/bijaxawitesubiba.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/anemia_por_deficiencia_de_vitamina_c.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/10970108534.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/nisuwejesujavekizejelela.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/budgeting_profit_planning_and_control_welsch.pdf
    • https://cdn.shopify.com/s/files/1/0432/9757/0980/files/velisono.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/sadikenirefol.pdf
    • https://cdn.shopify.com/s/files/1/0432/8698/6908/files/pesoneruwiwariwati.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/clicker_heroes_ancients.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/ashrae_189._1_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6612/2662/files/15330494151.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8362/files/vupufeguvarowogirunoz.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_off0000779c.bin
646ceb916b17927e7a6130493631188ea31a4399a42e1e6f761520475f3fc9fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x779C 5036 bytes
font_01_sfnt_off00008893.bin
94c48a9406cdb17cb487a33d92911ea176f74f0f9a96ecf895078428efa189bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8893 11928 bytes