Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f4dda4d09b919c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 17:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a14ab546295a6535c66908f3421924 SHA-1: 2337ee6b8c1233389fd71e22f919ba3a1a712f1e SHA-256: 37f4dda4d09b919ccc4a9bdc5e625e8a87e0f65779befaad3081b13184e07dd5
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm designed to manipulate SEO. The primary malicious URL identified is ttraff.com, which is known to host redirectors. The document body contains a mix of seemingly legitimate text and embedded URLs, suggesting a lure to attract users to click on the malicious links. No scripts were extracted from this sample.

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/wb?keyword=tipos%20de%20liderazgo%20tesis%20pdf
    • http://files.jesuitapush.com/uploads/1/3/0/8/130813317/walome-sefukabekewusef-vebaralanoguxel.pdf
    • http://files.toyourjoyaromas.com/uploads/1/3/0/8/130813357/1809611.pdf
    • http://files.bustihistoricalsociety.com/uploads/1/3/1/6/131606727/fdd63.pdf
    • http://files.katherinedolen.com/uploads/1/3/2/7/132740288/a66ee.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/periods_of_english_literature_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/lirufadod.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/digital_electronics_projects_for_engineering_students.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/seworaletig.pdf
    • https://cdn.shopify.com/s/files/1/0434/4663/2615/files/action_plan_steps.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/pdf_econometrics_of_financial_markets.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/xuvarotagigerobosavuzuxo.pdf
    • https://cdn.shopify.com/s/files/1/0443/1357/5580/files/origen_real_del_nervio_facial.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/filariasis_usu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/77396746993.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/sazabababof.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/xetobanidoxepukev.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_off00006374.bin
3cccfff662fb46eb624e429b5dc79645424284a31f6143ddafa35c85c7fb38e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 5208 bytes
font_01_sfnt_off0000753d.bin
fac59dc5e7554451b4f1030e1567c86753231500ab639968ecc18bedc37fc34e
pdf-font-stream PDF embedded font (sfnt) at offset 0x753D 11068 bytes