Malicious PDF — malware analysis report

Static analysis result for SHA-256 75963d12fd355e54…

MALICIOUS

PDF

46.6 KB Created: 2020-08-10 16:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52c52624c9324a17c9c3222388c66236 SHA-1: 4721252056c967fb1a0b3225c83b7dbb4423734e SHA-256: 75963d12fd355e5418f9a2fb03a59a817d343a9a158d343a3311d6b7bd6493c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, disguised within the document body. This redirector is likely used to funnel victims to malicious content or further stages of an attack. The presence of numerous other PDF links, many pointing to benign Shopify URLs, suggests a link farm or SEO manipulation tactic to obscure the malicious intent. The ML classifier also strongly indicated maliciousness.

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=button+mushroom+cultivation+pdf+in+tamil
    • http://files.mountbiggs.school.nz/uploads/1/3/1/3/131398452/kowuvanogivujeg.pdf
    • http://files.choosefreedomlovely.com/uploads/1/3/1/0/131070030/8e886fa47a0d92.pdf
    • http://files.tomgillisportraits.com/uploads/1/3/1/4/131453577/lujavulinezinoroje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9755/5098/files/49816061651.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/introduction_to_automata_theory_languages_and_computation_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/dress_design_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/59691665209.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/fobenuzukuzatanimupi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/rugolipegun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/32268716822.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/37461953276.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/fomaruvenotu.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_off00006d89.bin
8325c6fec3869d70defbf8c44ad36f18ed9cb2a3143953edc54532a0e57e743f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D89 5504 bytes
font_01_sfnt_off00008015.bin
309322b72622291b4e5b66be2e7cd45c2c09cdc6563c21b86ca53b691d57deea
pdf-font-stream PDF embedded font (sfnt) at offset 0x8015 14884 bytes