Malicious PDF — malware analysis report

Static analysis result for SHA-256 675b0f44e6ea6c02…

MALICIOUS

PDF

50.6 KB Created: 2020-08-03 01:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e32fb6a73591faad99bff813e3978249 SHA-1: b450826355b764ec37f6520a5af9517f643e2420 SHA-256: 675b0f44e6ea6c02ebb80f2bcd872bd4244c70fee004a2598137c9e6ccb83204
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a redirector to malicious infrastructure at 'https://ttraff.com/pify?keyword=country+code+39'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards an attempt to redirect the user to potentially harmful content.

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=country+code+39
    • http://files.brianhennig.net/uploads/1/3/1/4/131452929/goviwasewo-jurobizogabir.pdf
    • http://files.mrsjensensclass.com/uploads/1/3/0/7/130739415/78097c69e.pdf
    • http://files.foolsizetheatre.com/uploads/1/3/0/7/130776370/jovebu_mawuli_goremowu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/7993/1806/files/hitman_agent_47_soundtracks.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4979/files/kuvoson.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/joxubimaguzipenupaluzawor.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/71936803542.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/tuxinu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/dopidasuvataremedut.pdf
    • https://cdn.shopify.com/s/files/1/0434/8428/3033/files/dusowenawonuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/7251/0362/files/gubide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/push_to_new_github_repo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7727/8623/files/oracle_10g_express_edition_free_download_cnet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7959/files/vamikexubatimiro.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_off000072e0.bin
0cb19acd1dfc66f8ac534241426db57ab8173f01575065745351da2aa3655c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E0 4792 bytes
font_01_sfnt_off0000833a.bin
2b23f4205d72942e49dfdb327c1fd5283d1969b0d30a3014508b8d73e2ec399b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x833A 14472 bytes
font_02_sfnt_off0000b005.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB005 4324 bytes

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