Malicious PDF — malware analysis report

Static analysis result for SHA-256 023245213b39e3fe…

MALICIOUS

PDF

43.4 KB Created: 2020-08-29 20:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 909a834b3fbf1eacfd9f34d9000a0ce1 SHA-1: 77c4a45de50d3113a91881f874b410115d119cd8 SHA-256: 023245213b39e3fe8b5651721f00e0bf6fcb0754e38c86089fb1f482b9510094
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary redirector link to 'ttraff.com'. This, combined with a large number of other PDF links, suggests an attempt to drive traffic to malicious infrastructure, potentially for SEO poisoning or phishing. 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=what+is+dodd-+frank+certification
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/ford_focus_haynes_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/pubiguxutedizoxorekagut.pdf
    • https://cdn.shopify.com/s/files/1/0462/7736/1813/files/75215976694.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/57075481987.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/assessing_reading_j._charles_alderson.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/zodaxubedi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4918/files/watch_21_jump_street.pdf
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/47851991083.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/tegadegewemowelafuvi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d6e.bin
2782490d63b96108cb06a8ef94016bc89b3a71ce23526f241ba69fc4b1cf7eb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6E 4972 bytes
font_01_sfnt_off00006e5b.bin
dce975c4ae751dd82aac4b943aa607ae80249c412f76337ddd8f45fde4b88df8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5B 10772 bytes
font_02_sfnt_off00009307.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9307 4324 bytes