Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca70e5ee73647d2…

MALICIOUS

PDF

53.3 KB Created: 2020-08-16 15:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14e455390a5288b59d4d63ee15f46c44 SHA-1: 48f7efde040b301449763afb0690839fc7943678 SHA-256: 7ca70e5ee73647d2af91c7e6b10c1cd64a9b1b43464666fb0e203431dd254abf
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious URL, disguised with text suggesting "Vip betting tips app". The PDF also hosts a large number of external PDF links, many of which point to Shopify domains, suggesting a link farm or redirection strategy. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=vip+betting+tips+app
    • http://files.artistnik.ca/uploads/1/3/0/9/130969895/wevifub-rikujed-garizevuwekagu-kubuwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/tijadiwosamupijejitapakog.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8589/files/lumiere_blanche_cecilia_wang.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/dynamics_of_machinery_2_marks.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/puvos.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7637/files/troubleshooting_of_air_conditioning_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/9217/1165/files/meridian_energy_pen.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/suxevaduwufutigolilaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/jemalosoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/jikixi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/46575011453.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/bojizatesunovazuvala.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005de7.bin
aed68d4688c5538ad739dc34fe7b021762a5fe189a2c8aadf4ae1431913f6506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE7 4644 bytes
font_01_sfnt_off00006db0.bin
3a8d4ba9c5f71166e9b974aca22d2a9e4cc07d676201286e0cb9d579a5728872		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB0 7528 bytes
font_02_sfnt_off00007edd.bin
137b2376903048475117ef0d226efddabf9986d26f1471d870f17116be9eff33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDD 10916 bytes
font_03_sfnt_off0000a462.bin
92ca5277a07040a1118e6ffe557fff1b4332eaf15e577e4df2dfa25513d903e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA462 16336 bytes
font_04_sfnt_off0000b9e5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E5 4324 bytes

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