Malicious PDF — malware analysis report

Static analysis result for SHA-256 6748a8974e49c4df…

MALICIOUS

PDF

43.1 KB Created: 2020-08-07 03:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed8ac50f347bc32c5d5887a1ed713993 SHA-1: 42ea33f96cc865c85096a6b57dd169379ad8462f SHA-256: 6748a8974e49c4df7e499857c13ddba0fb8668865c366da7c3933861284e32a9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=export+pdf+without+bleed+indesign`. It also contains a large number of embedded links, many of which point to benign Shopify URLs but some are unknown. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking PDF links, suggesting a lure to external content.

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=export+pdf+without+bleed+indesign In PDF document text
    • http://files.unraveledportland.com/uploads/1/3/0/7/130738988/rusol.pdfIn PDF document text
    • http://files.kemiwest.net/uploads/1/3/0/7/130738607/4851303.pdfIn PDF document text
    • http://files.oestore.shop/uploads/1/3/1/4/131406173/962837.pdfIn PDF document text
    • http://files.wrigleyconsulting.com/uploads/1/3/1/4/131405977/8661124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/mometomigimalituguterub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/76918511015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/centos_7_terminal_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/difference_between_centroid_and_centre_of_gravity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1498/7669/files/67328403846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/86179433993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/bolenokelij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/free_female_vocal_samples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4617/3852/files/pharmaceutical_cold_chain_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0605/7883/files/33448023770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/bejijofopekeriribejoledum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/32600765790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9906/8318/files/6508535729.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000698a.bin
dc04a9f9d7c91b53f7661ae2ffae1f78fff1e7073191898c1ea1323b0e5fd383		 pdf-font-stream PDF embedded font (sfnt) at offset 0x698A 5348 bytes
font_01_sfnt_off00007bd2.bin
7cc674d3696e9e31bb8881ec45a691ec8a4f2c04fd7293d327675a625f84ee1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD2 10264 bytes

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