Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee52e260a0ac33ea…

MALICIOUS

PDF

42.2 KB Created: 2020-08-06 12:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9728e4c58a442ded41ec34313414dc0 SHA-1: 09e70c508f087192815ae09c3877a6ff835d3578 SHA-256: ee52e260a0ac33ead3dd828aba7db2478e0dca4c3003cd038773c0fa48d3c080
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body also contains the same URL, presented as a lure for a 'converter pdf to autocad free software download'. This indicates the primary goal is to redirect users to malicious content. The PDF also contains a mass external link farm, suggesting SEO poisoning tactics to increase visibility.

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=converter+pdf+to+autocad+free+software+download
    • http://files.amandamelissa.co/uploads/1/3/0/7/130776828/1818115.pdf
    • http://files.transitandtales.com/uploads/1/3/2/6/132695278/jifonorupibida-fibufe.pdf
    • http://welelolag.oldragmasternaturalists.org/uploads/1/3/2/6/132682883/mupawisax.pdf
    • http://files.falconlegalconsulting.com/uploads/1/3/1/4/131454770/datumifakiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/92744008499.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/business_process_improvement_toolbox_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/the_magician_s_land.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/74133443482.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/82476691217.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/all_accounting_terms_and_definitions.pdf
    • https://cdn.shopify.com/s/files/1/0432/1679/7857/files/biological_science_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/0914/7043/files/importance_of_cation_exchange_capacity_in_soil_fertility.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rofimoluxita.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/maths_word_problems_for_grade_2_addition_and_subtraction.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/25124784367.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5607/files/45262380191.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/raxonogibogisujigif.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000666f.bin
a57a3e7b6ca35b5d9b030ca4647ff8721735c744242fd05480fe41a5bbfa7715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666F 5204 bytes
font_01_sfnt_off00007843.bin
58e4bb50ac00b7d8ef60d2c5d1d2381f8068c9902558bbbf664beac3be164cf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7843 10316 bytes

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