Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5247bbe2b8551a…

MALICIOUS

PDF

34.0 KB Created: 2020-08-23 19:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ede0ee16fa097488e0f2c961d3895e4 SHA-1: c23713ad263e0ee501a6a3bc606b0d9ac906a61f SHA-256: 0c5247bbe2b8551acdadef99d3f2f47d241de62a60721169ad5ae230beae6b10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), indicating a malicious intent to redirect users. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=suddenly+it%2527+s+magic+movie+free
    • http://files.assuringgraduatecapabilities.com/uploads/1/3/2/8/132814958/7861692.pdf
    • http://files.diymandalastones.com/uploads/1/3/2/6/132695601/1e5bf.pdf
    • http://files.caseylynnroland.com/uploads/1/3/2/6/132695401/pilelu-daxurerosagevan-vedujoki-gubumuguw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/91188103588.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/85901374759.pdf
    • https://cdn.shopify.com/s/files/1/0439/4981/8024/files/free_pumpkin_carving_stencils.pdf
    • https://cdn.shopify.com/s/files/1/0431/6158/3776/files/89950661277.pdf
    • https://cdn.shopify.com/s/files/1/0429/6671/2479/files/39496408984.pdf
    • https://cdn.shopify.com/s/files/1/0433/3987/4462/files/difference_between_film_coated_and_enteric_coated_tablets.pdf
    • https://cdn.shopify.com/s/files/1/0440/8662/4406/files/10625291969.pdf
    • https://cdn.shopify.com/s/files/1/0448/9238/9531/files/advertising_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/4243/8310/files/english_russian_business_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0440/4248/5910/files/450163941.pdf
    • https://cdn.shopify.com/s/files/1/0429/5432/6179/files/wokujevemujoxogofaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/evaluating_algebraic_expressions_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8167/files/wegesugitajaxigenoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/zinojufiraja.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_off0000464b.bin
ab15ef9eee5e8760280e3ce7acfe9e767b4b838752fcd277140711cd41f5b634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x464B 5640 bytes
font_01_sfnt_off00005970.bin
69a26d78ee4528e2c90f131015401e5f78a24c15f0fdd1ad4c0fde0289b93631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5970 9780 bytes

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