Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d34d9978c94b5a…

MALICIOUS

PDF

43.3 KB Created: 2020-09-07 14:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3844d80ba6628b21060279b9aa5045f3 SHA-1: 4f89f74e912e2dc8fecee95932d53a8eec0969d7 SHA-256: 96d34d9978c94b5a88512dc8997d873d2e6c57ec86533711a8c6844f17d08a1c
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text that appears to be a lure, mentioning 'Alteryx file from ftp'. The ML classifier also strongly indicated maliciousness. The primary IOC is the redirector URL, which is likely used to deliver a secondary payload.

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.club/pify?keyword=alteryx++file+from+ftp
    • https://static.usrfiles.com/ugd/5a1791_1bc0fed056e74615bd3fc2ca68851f13.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f4a2c07e0b840fabca3136754149fbb.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_a42edb7791854e44b134f7e0e9009294.pdf
    • https://static.usrfiles.com/ugd/4d935e_1960b5a279234598ac7fac6faafabc23.pdf
    • https://static.usrfiles.com/ugd/f0e51d_9e568c53760d4a57ac28c8b7f45f1a7c.pdf
    • https://static.usrfiles.com/ugd/0aab01_06563dfba3fa4db781d7e12021912acf.pdf
    • https://static.usrfiles.com/ugd/625844_3191c493863f4da2814b9260c4d149f2.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2305/files/duvaroti.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/31774210666.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/23938799198.pdf
    • https://cdn.shopify.com/s/files/1/0430/0560/8099/files/xxl_freshman_2014.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/45845887413.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/84684167271.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/67271131367.pdf
    • https://cdn.shopify.com/s/files/1/0439/0502/4168/files/bomasivusofukenovo.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_off00006ca2.bin
e7aae1e25480f91d5e863a263f8edf49d5da58f06009ad48772f154c714ab7c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA2 4816 bytes
font_01_sfnt_off00007d01.bin
e5a2a935645c78f425241944a647628e04b55eda21ce56011c4dedd1aaa8c55b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D01 10392 bytes