Malicious PDF — malware analysis report

Static analysis result for SHA-256 310a0449458ff074…

MALICIOUS

PDF

52.8 KB Created: 2020-08-28 07:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea917640aee877a0fbb99d151a541926 SHA-1: f12753521661e336f1c8ce95bd0e5edc52bd68bc SHA-256: 310a0449458ff07432b4be6ff132116108c0f5a1677dd1c9436cdfbba173d25b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the text 'Types of contrastive analysis pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site.

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.link/pify?keyword=types+of+contrastive+analysis+pdf
    • http://mafufegaf.narragansettgunclub.org/uploads/1/3/1/3/131379992/kibulewaxozij-dipalebif-jefigowavedisub-suniwurab.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/tivavuvubalamekupesopobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7225/7181/files/juvakekafebogilumileb.pdf
    • https://cdn.shopify.com/s/files/1/0436/4949/9289/files/48993973416.pdf
    • https://cdn.shopify.com/s/files/1/0451/2923/6634/files/historia_de_los_caballeros_templarios.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/27500585851.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/arcsoft_showbiz_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0461/4271/8115/files/lagu_mundur_alon_alon_adella.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9263/files/5572030452.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/mebabelonudejezokij.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/buell_theater_seating_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1001/files/fajofuwoguzegon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/77949774183.pdf
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/kufedasodusufasaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/types_of_graphical_user_interface.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_off0000924b.bin
9a0566d27334e0ea5234d88eedfa545e5fe0590bc902e99a244f1abd46231a4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x924B 5260 bytes
font_01_sfnt_off0000a446.bin
46b8cad621253bb592d0f5c743da0c867bde1307d2e4a22338f430e32fabfc56
pdf-font-stream PDF embedded font (sfnt) at offset 0xA446 9996 bytes