Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c331d4eb7c99886…

MALICIOUS

PDF

38.4 KB Created: 2020-08-16 21:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b013b5e44beead59ea51382fc1debd5a SHA-1: affbd36db7200280fa332b9511c3c81dd24080ac SHA-256: 2c331d4eb7c9988658d95e371c13bf4480bcade2c5a0e1fb849df98d5b2446fb
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=pathophysiology+of+heart+disease+pdf+lilly'. This URL is embedded within the document body, suggesting an attempt to trick the user into navigating to a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic to obscure the malicious redirector. 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.cc/pify?keyword=pathophysiology+of+heart+disease+pdf+lilly
    • http://files.americaimproving.com/uploads/1/3/0/7/130776611/15d3b7964508.pdf
    • http://files.railyardapothecary.com/uploads/1/3/2/6/132696274/nozafadire_sawopivo_ritutefofirob.pdf
    • http://bafow.elitepowerinvestigations.com/uploads/1/3/1/3/131398591/pekivujifitoro.pdf
    • http://files.ontheroadwithpayal.com/uploads/1/3/1/4/131409861/bukivaruritibes.pdf
    • http://dimix.cengledesigns.com/uploads/1/3/2/6/132683001/7dc81a3bc0bacd0.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/nucleic_acids_molecular_genetics_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0446/8919/5161/files/85311601168.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/animal_migration_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/pre_b._ed_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/9096/7714/files/95012450872.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/biodiesel_production_journals.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/falogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/68614825859.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/68011062.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/ultrasonic_sensor_hc_sr04_and_arduino_tutorial.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_off00005765.bin
73aa376cb24328717a28d9036c2a5f8d682467af341b70ace075c317b85f5672
pdf-font-stream PDF embedded font (sfnt) at offset 0x5765 5408 bytes
font_01_sfnt_off000069c6.bin
3f41b02b507ba04240fe4d734035371a9ba330a41d842e3a340bed7cb2e30545
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C6 10316 bytes