Malicious PDF — malware analysis report

Static analysis result for SHA-256 932c0e82b82e1c3d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-16 22:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e12e026f23750f97d8873e34a72b80db SHA-1: 46447256da5ae91aa9cad0ef8e5e1efeafe03cf3 SHA-256: 932c0e82b82e1c3d7d75792f529bffde520e021ee3914d22bcabaad5e2558002
154 Risk Score

Malware Insights

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

The PDF contains a critical redirector link to 'ttraff.com', indicating a malicious intent to lure the user to a potentially harmful site. Additionally, the document exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence for the attack pattern.

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=becoming+ch%25E1%25BA%25A5t+michelle+pdf
    • http://files.phillychildrenshouse.com/uploads/1/3/2/6/132695384/6314595.pdf
    • http://files.westaucklandcadets.com/uploads/1/3/0/7/130775992/5356230.pdf
    • http://pafujaruz.denisehartzler.com/uploads/1/3/1/3/131380005/4918875.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/37986068575.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/business_management_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/sedepegazawip.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/23870838769.pdf
    • https://cdn.shopify.com/s/files/1/0428/8600/4899/files/kizewutoram.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/vowel_and_consonant_sounds.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/gitoganimoxilefujajalapo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/minister_s_service_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006176.bin
f796652074bdacf594af6079cc738af39fcab6650df9181532e00d0e5f60919b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6176 5392 bytes
font_01_sfnt_off000073a1.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A1 1800 bytes
font_02_sfnt_off00007c2e.bin
b24652727041172cbde31ae7588cda13bc9c1d0e8457f8de1106085e4be286e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2E 10296 bytes