Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0790279c2146cfc…

MALICIOUS

PDF

37.0 KB Created: 2020-08-09 06:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f397e6dbf0cf5f3d8dccb2c8987bae32 SHA-1: 7d6f92dc959b8f323863c33cae01901286a8f9ba SHA-256: e0790279c2146cfc0b6fcf73f8cf5584f001e3e6c44d3bfa463b1ae5664d7321
152 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.cc'. Additionally, it exhibits a PDF link farm heuristic, indicating an attempt to host numerous external PDF files. The ML classifier also strongly flagged this PDF as malicious. The presence of these indicators suggests the document is designed to redirect users to malicious infrastructure, 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.cc/pify?keyword=bayless+conley+books+pdf
    • http://files.fosterperrytravelevents.com/uploads/1/3/0/7/130775373/1f27d.pdf
    • http://files.rodanthesurfshop.com/uploads/1/3/1/4/131437423/560757.pdf
    • http://files.arterialculture.com/uploads/1/3/1/4/131482822/rudegimaximeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/pewixozuzobupakepa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/dagatujesow.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6645/files/navevagolobejowewi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2352/2216/files/servidor_web_libro.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/definicion_de_anexos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0429/1215/3766/files/soxenix.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/rafoliwufobapurawuvezamaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/88189777927.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4344/files/rutazel.pdf
    • https://cdn.shopify.com/s/files/1/0433/5114/6650/files/donawonodejamuziba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96280370261.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_off000052e3.bin
a6d5b85418cc8a4ab31530a52014a8f395607c805098078ea2d81513c9d9ecb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x52E3 5408 bytes
font_01_sfnt_off0000656c.bin
f7001baca5c6709e34e819af2d913e6fd08d99fb26634bb4e80195d67726f0f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x656C 9932 bytes