Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ee610d8b7fe45a…

MALICIOUS

PDF

54.1 KB Created: 2020-08-30 12:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 240ec655c91f23c4b76b482abee0b2e0 SHA-1: 3f3962035b6d02645b4f2853527158dea78bef29 SHA-256: 80ee610d8b7fe45ace3565ef65e8f863b2d6c08dcc48e1739ce8b3bc17c72a59
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a critical heuristic firing for a redirector link pointing to 'ttraff.com'. This URL is likely part of a phishing or malware distribution chain. The document body contains the same URL, reinforcing its role as a lure. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=nursing+care+plans+diagnoses+interventions+and+outcomes+pdf
    • https://static.usrfiles.com/ugd/834936_d0e1fcd5c8c7430ba57ee5e1942cafb4.pdf
    • https://static.usrfiles.com/ugd/b8c837_94654a8b021846d6a31af0396024b847.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf2b371bcc72483caeeb6e56aeef2e0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_20112825a67444488be804422d35c2d6.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4687/files/nsfas_online_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0579/files/2471082237.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/kejebikuwos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0448/files/89222494477.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/5261434708.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/frontline_commando_mod_apk_home.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/wubiroxesadiloxemegonari.pdf
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/kshatriya_putrudu_telugu_movie_free.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_off000095a2.bin
b13ec256fb93757d0efda8bec64498c83a148396a1894e3fb0aad80aa4835d60
pdf-font-stream PDF embedded font (sfnt) at offset 0x95A2 5504 bytes
font_01_sfnt_off0000a84d.bin
e8a97d92fe1c013b3b6b54dbf7ed4f66e375290fcc0f69a5c3ca918d740ddb7e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA84D 10108 bytes