Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b29a842531f1c2…

MALICIOUS

PDF

96.8 KB Created: 2020-09-03 10:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b0c541e5f803ff356bd06cb35c79e5 SHA-1: a3cfd2afe501885a83e5490ebba9806f0a1d1e5b SHA-256: 09b29a842531f1c22eccfcaa0e4e3d24234b098a156f82c2a1a81e2cbe22a157
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 a link farm designed to manipulate search engine results. One of these links, https://ttraff.ru/wix?keyword=new+ayyappan+songs++masstamilan, is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL.

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/wix?keyword=new+ayyappan+songs++masstamilan
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6778/4864/files/free_lady_chatterley_s_lover_movie.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/clarinet_sheet_music_greensleeves.pdf
    • https://cdn.shopify.com/s/files/1/0431/4729/6924/files/alabama_dhr_mandated_reporter_training.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/how_to_write_a_readme.pdf
    • https://cdn.shopify.com/s/files/1/0434/1710/8642/files/attaccamento_e_perdita_vol_1.pdf
    • https://cdn.shopify.com/s/files/1/0440/7515/5621/files/bestiario_mitologico_nordico.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/46318554335.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/36676110385.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0309/files/la_fitness_workout_log_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/simple_business_partnership_agreement_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/plant_callus_culture.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/eve_plex_prices.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/bankruptcy_and_insolvency_act_2020_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/xukeperefe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7498/files/how_to_cite_article.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_off0001390b.bin
1ec4b3e9f0170dd3be31144e8b2c5308ba3959be60a1bacd465251bf30db4dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1390B 5208 bytes
font_01_sfnt_off00014ad6.bin
8dd0fc1ec2406346a38e9e3eed5de90167a95bf7be5770bdef2e9028752f6d36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD6 14036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.