Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c30877ff3afc4c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-12 12:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8f6b9da144d727aaa842c60d8904635 SHA-1: 64d6b3fcae45105a2acb2c324aceb1d1b712a163 SHA-256: 47c30877ff3afc4c5728a112fb04dba1dbcb197b69faaa8dd7744e9a6df4bedf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning model and contains numerous embedded links. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. Another heuristic identifies a large PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of these links and the ML classification strongly suggest a malicious intent, likely related to phishing or SEO poisoning.

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=aparato+digestivo+partes+y+funciones+pdf
    • http://kawobuto.virginiasar.org/uploads/1/3/1/4/131453574/2e47be5f3.pdf
    • http://files.tourofguam.com/uploads/1/3/0/7/130738596/546fa4fc8a7fa.pdf
    • http://werasina.connellyskis.com/uploads/1/3/1/6/131606289/3987112.pdf
    • http://files.chemisthompson.com/uploads/1/3/1/4/131438459/jepakunekirip_zifafopo.pdf
    • https://cdn.shopify.com/s/files/1/0446/4685/8915/files/automata_theory_languages_and_computation_hopcroft.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7491/files/hinduism_origin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/court_of_the_crimson_king_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/67293618389.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/54843846896.pdf
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/93999061935.pdf
    • https://cdn.shopify.com/s/files/1/0435/1282/3967/files/tojakawaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/concepto_de_cadena_alimentaria.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/tratado_de_direito_penal_1_cesar_roberto_bitencourt.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/gaxamefabufurod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2317/files/68480135715.pdf
    • https://cdn.shopify.com/s/files/1/0434/2461/2508/files/nirinaxibifuvonusosulo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7704/1304/files/64495868844.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_off000065b7.bin
08770cca990a785b807f8f8ff3abfbed95260c9fad279724b5a220471b59ef53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B7 5444 bytes
font_01_sfnt_off00007856.bin
76c764ac5420a06f8e9cc8180346ece1770fe65c1842cd8c9b14b1888f25627d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7856 10900 bytes

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