Malicious PDF — malware analysis report

Static analysis result for SHA-256 045a6d47d1328687…

MALICIOUS

PDF

40.7 KB Created: 2020-08-17 18:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fbcc5f2d125be709be685b74e65b3d8 SHA-1: fd3f78c867a80c7a770b1c51b1caf5347fcba8f2 SHA-256: 045a6d47d132868776968e6f2cc82ee81cb6571c633a993b0b5ed0e1cbd7180d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=ip+word+family+worksheets+for+kindergarten'. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content. The document body, though heavily obfuscated, contains references to the redirector URL and other Shopify-hosted PDFs.

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.ru/pify?keyword=ip+word+family+worksheets+for+kindergarten
    • http://files.andreareynolds.net/uploads/1/3/1/4/131437037/c883972241920.pdf
    • http://files.torrancerosefloat.org/uploads/1/3/1/1/131164250/fuwalinonasixiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/xawitolukesutetoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/9th_class_english_textbook_ssc.pdf
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/72584301734.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fedixudarat.pdf
    • https://cdn.shopify.com/s/files/1/0429/8522/6393/files/temaruvunezigenilirozi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/60228994349.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/36386712087.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/17861202069.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/30844154497.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7802/files/adverb_of_degree.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_off00006094.bin
04884e3186eb0730948f584a86d309ef77e2e0ff3faae84fc134d8634948bd7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6094 5648 bytes
font_01_sfnt_off000073c1.bin
649370fa721346b1a1106e8fa622c5f5f1c6bf6cd00cbeedad7a13929d8f6914
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C1 10080 bytes