Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a7258fb7691a76…

MALICIOUS

PDF

45.5 KB Created: 2020-08-13 23:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbce10066c10652d76f96aac5ba01138 SHA-1: c66ff11e41c79668c24a271eed722795b184b6a8 SHA-256: 62a7258fb7691a76c592a2a69d5585237eb8ffe87afd6a92632b8b273e07df5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://ttraff.com/wb?keyword=learn%20german%20with%20short%20stories%20pdf', suggesting a lure to external malicious content. The presence of a large number of external PDF links further indicates a link farm or redirection scheme designed to lead users to potentially harmful sites.

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/wb?keyword=learn%20german%20with%20short%20stories%20pdf
    • http://gogov.laniefrick.com/uploads/1/3/0/7/130776644/6a79b.pdf
    • http://files.makinghairsmile.com/uploads/1/3/2/3/132302749/fesagufu_perudovazezorem.pdf
    • http://nakosowo.theridgevillebakery.com/uploads/1/3/0/7/130775521/povemizejamebesenij.pdf
    • http://files.holyfamilytopeka.com/uploads/1/3/0/7/130740429/51311a3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/testi_e_accordi_canzoni_napoletane.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/amish_tripathi_sita_warrior_of_mithila_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0443/0177/9100/files/adobe_acrobat_reader_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/vovavevofedaxuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/mapa_mundi_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/91089435256.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/jenukegasorefezuvef.pdf
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/62244675370.pdf
    • https://cdn.shopify.com/s/files/1/0440/3612/8933/files/42442402971.pdf
    • https://cdn.shopify.com/s/files/1/0431/2501/4684/files/tugejerijikunoguwagosafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/phase_1_and_phase_2_reactions_in_drug_metabolism.pdf
    • https://cdn.shopify.com/s/files/1/0438/7530/3592/files/28962568995.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/43973938796.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1665/files/20326159976.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/suxesovusigezolegazasu.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_off000066cc.bin
395c57df09fa90d9973b4335798eeff6773bb2b1c0424048d5b8d981bd6a849a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CC 5244 bytes
font_01_sfnt_off00007884.bin
3045264e56c830e87d3d9a1c3516b1d56649a050b9e19c95cd67b2b635ae4cdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7884 9980 bytes
font_02_sfnt_off00009aa5.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA5 4324 bytes

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