Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfeb378f36c6e0a…

MALICIOUS

PDF

40.4 KB Created: 2020-08-19 01:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 259b0f25a8784330faacfd1a882d892b SHA-1: 1b93b3844e7000a66380ada254d178ca0a0d7e52 SHA-256: 7dfeb378f36c6e0afb8f2ab704d2d916a9b92bea3f2f3ce5b8f4ac332ae19405
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=destination+b2+unit+3+answer+key'. This URL is designed to redirect users to further malicious content, likely for phishing or malware delivery. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting an attempt to obscure the true malicious destination or leverage legitimate platforms for distribution. The ML classifier strongly flagged this PDF as malicious.

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=destination+b2+unit+3+answer+key
    • http://valena.sianyeshe.com/uploads/1/3/2/6/132682879/pibujinosa_vixilinudinut_visik_vaxezapukalenil.pdf
    • http://files.philippecorriveau.com/uploads/1/3/1/4/131406507/2612576.pdf
    • http://zifevuzab.harmonyremoterepair.com/uploads/1/3/1/3/131384021/nuvudusox.pdf
    • http://files.projectindianbeauty.com/uploads/1/3/0/7/130776757/8342940.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/87985489695.pdf
    • https://cdn.shopify.com/s/files/1/0438/3136/1686/files/broken_hearted_lyrics_beyonce.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/kekanonakixaputal.pdf
    • https://cdn.shopify.com/s/files/1/0438/2395/6125/files/81977874829.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1726/files/mezolu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1638/files/dowokutubuxixebuvemuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6082/files/96316659284.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5176/files/27492177614.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/behringer_xr18_edit.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/camilla_lackberg_knjige.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_off00005ee6.bin
71ded1383823a7ad0aac7d8f84033de4da10067a0deed9ad6fddaf2187f9f0d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE6 5340 bytes
font_01_sfnt_off0000713a.bin
039ea5e41299e7dadeced823d9c9085fb3313f05c19303373d6117be25e7f48e
pdf-font-stream PDF embedded font (sfnt) at offset 0x713A 10668 bytes