Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bd6e57331cd0c8…

MALICIOUS

PDF

44.4 KB Created: 2020-08-10 22:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52fceece704400866d0065b1ffd2d0f9 SHA-1: ffab422b23e5568f1c646234419bacead484e292 SHA-256: 08bd6e57331cd0c827563c9ab8a4f01f7522a38b85b9d92ad94c405dd28314cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'US airport codes list pdf', suggesting a lure to disguise the malicious intent. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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.com/pify?keyword=us+airport+codes+list+pdf
    • http://kopikag.techedteacher.com/uploads/1/3/1/4/131437423/7623282.pdf
    • http://files.michelepowles.com/uploads/1/3/1/3/131379803/3968611.pdf
    • http://files.makingiteasycambodia.com/uploads/1/3/2/3/132303238/lozuroduzon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1819/7912/files/91785450778.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/sumojuguruzi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/34676698017.pdf
    • https://cdn.shopify.com/s/files/1/0437/4704/9621/files/how_to_restrict_bot_commands_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0439/2108/0475/files/organophosphate_and_carbamate_poisoning.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/jefifasak.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7014/files/tofividusomikukeri.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2626/files/zsh_syntax_highlighting.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/fetexigipupapite.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/segoridugonafugifit.pdf
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/application_form_for_british_passport.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000708a.bin
d96bd586d460538247b964c1f52b770fc06d995dae2147397efd0807db97db6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x708A 5140 bytes
font_01_sfnt_off00008210.bin
8f06aeb7ef40d132f465097b8fce2e04d2e3b8f1c852f2fb7cb1c0089c7540dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8210 10192 bytes