Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e59b2428a42111d…

MALICIOUS

PDF

61.4 KB Created: 2020-08-06 04:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cffdeb7c98eb8742b903e314fbd0c0ab SHA-1: 82cba5c74b0360be73009e4886830c9e28a9c496 SHA-256: 9e59b2428a42111d583cf3b7a21423c0c150252ec9e783cc261ba6b993ee45cf
152 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 a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=nabucco+libretto+english+pdf. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware delivery.

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=nabucco+libretto+english+pdf
    • http://files.florablackettdesigns.com/uploads/1/3/0/8/130874278/5fc03373bfaabc.pdf
    • http://files.materdeisupermileage.com/uploads/1/3/1/0/131069970/divofofukagew.pdf
    • http://files.touatvue.com/uploads/1/3/0/7/130775635/88725546faa96.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/faboxoposebuzitibov.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8940/files/essentials_of_contemporary_management_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/quality_assurance_technician_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/texas_form_130-_u.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/bewabawiritojumeso.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/gakozekotowerepox.pdf
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/history_egypt.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/21237809437.pdf
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/gelojawujazudamevovinijog.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/54018683983.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/lubid.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/66688904321.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/zovefovu.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_off0000b2db.bin
9a6c068212199fa136e47117066d5191b69f8ab6df0c8a77545ad3fde47b456e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DB 5524 bytes
font_01_sfnt_off0000c59a.bin
7612f423d69f5db677007a0e25f64a8f6ac2f73e6e33be33c7ef9a30bd184928
pdf-font-stream PDF embedded font (sfnt) at offset 0xC59A 10172 bytes