Malicious PDF — malware analysis report

Static analysis result for SHA-256 834fdedd696b1d87…

MALICIOUS

PDF

51.3 KB Created: 2020-08-27 15:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 753d335ff8899254a22e4c473379c0f0 SHA-1: e644783ad7b7dc566cd7df8ac0759ec9913e87d7 SHA-256: 834fdedd696b1d87b36821b1bdc724ec8577bd9d4d204d812a8693fbbbf27125
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.com', suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same redirector URL. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to malicious content or phishing pages.

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=mecha+tabletop+rpg
    • http://pudujanuf.luhkiaunni.com/uploads/1/3/2/6/132683071/guxiligani.pdf
    • http://fejejore.beatbettingtips.com/uploads/1/3/2/6/132682646/zefevugi_rapano_tazepetexozowos_vaxomibegu.pdf
    • http://xukeji.808spray.com/uploads/1/3/1/3/131379510/7fa13a084d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/kovatalefawosofikefuwufe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1508/files/ave_maria_bach_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/rajimimenaf.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0966/files/17123915807.pdf
    • https://cdn.shopify.com/s/files/1/0435/2416/1695/files/vaccine_card.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/weather_report_akbarpur_ambedkar_nagar.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/2014_cadillac_ats_2._5_performance_parts.pdf
    • https://cdn.shopify.com/s/files/1/0434/5525/0598/files/present_simple_tense_passive_voice_e.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/gelokakojo.pdf
    • https://cdn.shopify.com/s/files/1/0447/2212/7004/files/pharmacology_of_cholinergic_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/66855719220.pdf
    • https://cdn.shopify.com/s/files/1/0443/8104/4902/files/stephen_harrod_buhner_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/synapse_script_hub.pdf
    • https://cdn.shopify.com/s/files/1/0462/7166/0189/files/dante_s_inferno.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ba4.bin
3d1e0eb084bea4290e3297116e6a04f106460976e4401a55046aefb3cb223e46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA4 5164 bytes
font_01_sfnt_off00009d2c.bin
6aba7cb77265468cd665ba3739823fb4b271072786c8c9de7ed834404cfc9481		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D2C 10240 bytes

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