Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6fb42f1038ed66b…

MALICIOUS

PDF

34.7 KB Created: 2020-08-08 02:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a65934d4b179b557232f9349d4a4a278 SHA-1: f755fa328e0371ce6e73231d80d9b6d0c3c67aac SHA-256: a6fb42f1038ed66b4308388359223e8334555ccf683c82c67dbf893436d73a0d
150 Risk Score

Malware Insights

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

The PDF file was identified as malicious by an ML classifier and contains a link farm of external PDF documents. One of these links, 'https://ttraff.ru/pify?keyword=binocular+anomalies+diagnosis+and+vision+therapy+pdf', is a known malicious redirector. The document body contains garbled text but includes the same URL, suggesting it is the primary lure. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to malicious content, likely for phishing or malware delivery.

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.ru/pify?keyword=binocular+anomalies+diagnosis+and+vision+therapy+pdf
    • http://files.fairgreenoutreach.com/uploads/1/3/1/4/131453208/verol.pdf
    • http://files.cortneydenman.com/uploads/1/3/0/8/130874633/1642195.pdf
    • http://diwuneka.mansionsiemreap.com/uploads/1/3/1/4/131409090/wudikikarile.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/30436582199.pdf
    • https://cdn.shopify.com/s/files/1/0434/3676/9437/files/logivupivamudaluvawezor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/10979724441.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/60721695691.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/blossoms_of_the_savannah_themes.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5290/files/sick_puppies_riptide.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0528/files/18694010750.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/supome.pdf
    • https://cdn.shopify.com/s/files/1/0434/6626/0642/files/sumber_daya_manusia_buku.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/causas_de_desercion_escolar_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0437/3859/5482/files/certificat_de_vente_de_voiture.pdf
    • https://cdn.shopify.com/s/files/1/0437/5884/6109/files/legetubida.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_off000047e3.bin
df03bfd4789f529bc3876380e4643caf6835a849a90be8692cddc48aaef30004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47E3 5780 bytes
font_01_sfnt_off00005b75.bin
a3aae3eb3ec40769677bef39323424a8134423c5fb8743f08318c13cba7cc88b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B75 9992 bytes

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