Malicious PDF — malware analysis report

Static analysis result for SHA-256 1982f6dd6329e66a…

MALICIOUS

PDF

57.6 KB Created: 2020-08-28 09:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0db9b90781958c18907a34826bc92958 SHA-1: a373544c5a9c86e77b97a6f8ebbf9dbeb06223e2 SHA-256: 1982f6dd6329e66a40eb86f76989d46110c05d6e8e3287823e4158e43f23b60f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to redirector services or potentially malicious domains. The heuristic firings indicate that the PDF is acting as a link farm, likely to distribute malware or phish for credentials. The primary malicious URL identified is https://ttraff.club/pify?keyword=fotos+de+enfermedades+del+nispero, which is flagged as a known malicious redirector.

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.club/pify?keyword=fotos+de+enfermedades+del+nispero
    • http://boxavapa.afrikanvoodoopriest.com/uploads/1/3/1/3/131383483/gikabivikavewu.pdf
    • http://wevino.animachristiretreats.org/uploads/1/3/0/7/130776008/4424f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/fatazapevotibenikifaxebus.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/pixelmon_air_balloon.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/mirro_pressure_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0413/files/patunigijutigevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/20224181757.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/acidosis_metabolica_severa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6760/files/baby_shower_invites_girl_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/absolute_value_graphing_transformations.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/dinuxofexisejike.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2749/files/pdf_to_word_apple_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7400/files/blackhawks_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/12032307110.pdf
    • https://cdn.shopify.com/s/files/1/0433/0366/5822/files/kovekabemijamexo.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_off0000927c.bin
6b228fc9158e4a91d9cf2cdf3c9fa6b0715f3c934491517c9f7944ced3f7e0a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x927C 4932 bytes
font_01_sfnt_off0000a31b.bin
3a779fab6e3a725e6993d8c8703f08e76e66c16d091afb8fb74f7c128fa3485e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA31B 12052 bytes
font_02_sfnt_off0000c9b6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B6 4324 bytes

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