Malicious PDF — malware analysis report

Static analysis result for SHA-256 af180ea8fb1da154…

MALICIOUS

PDF

50.3 KB Created: 2020-08-11 23:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 061bc0c91bf52ae28e62e221bee66f0d SHA-1: d15893aac44516f991c802304f0588fcb8da71c8 SHA-256: af180ea8fb1da15423b6d26bfdd6c86ca20a4085575d14851290efbc5977d8a8
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=astigmatisme+cours+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=astigmatisme+cours+pdf
    • http://files.houseofchina.org/uploads/1/3/1/4/131407668/vuder.pdf
    • http://files.leapoffaith4u.com/uploads/1/3/0/7/130775953/4255752.pdf
    • http://files.voicesinourchoir.com/uploads/1/3/1/4/131437194/ziwuvuvepuwu.pdf
    • http://xironid.plantiful-mama.com/uploads/1/3/0/7/130739678/bipokereniriraz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6633/5138/files/tratado_de_argumentao.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/39565941278.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/use_of_a_an_the_in_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0434/5672/5159/files/54172490197.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/puwot.pdf
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/valvoline_atf_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/8710/1094/files/6856747037.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/11907770535.pdf
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/77155325677.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3873/files/sheldon_ross_stochastic_processes_solution_manual.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_off00007c2f.bin
ae3775d289a3f895926b2e8329a5a412c909e7ddb8e3fefb262cf9432b8a8fda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2F 5432 bytes
font_01_sfnt_off00008e89.bin
41958ab95ea6715127a375a2a4ef960b2969b61e86bb84a0f3967b2c93958fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E89 14708 bytes

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