Malicious PDF — malware analysis report

Static analysis result for SHA-256 4566e3ba58a82aef…

MALICIOUS

PDF

44.2 KB Created: 2020-08-31 11:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc7f6f319e338bef2fb1e7123226ab5a SHA-1: a3beb7b8473011b94f4c3bcd538ce304cc6824d9 SHA-256: 4566e3ba58a82aef8fd8c488f2275c15792489f2259be0b66a3072c97d125c22
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. It also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to benign Shopify domains but one leading to a known malicious redirector. The document body contains obfuscated text and the target URL, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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/wix?keyword=warhammer+enemy+within
    • https://cdn.shopify.com/s/files/1/0431/0682/8441/files/durga_saptashati_stotram_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/penyebab_jantung_koroner.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/sony_rx100_iii_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1077/5464/files/nesc_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9977/files/lion_air_crash_report_full.pdf
    • https://cdn.shopify.com/s/files/1/0447/9392/1685/files/celpip_sample_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/46165575363.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/digexewamegexomonegasuwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/2516515977.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/ralimiludadekovufepuripad.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/gesadaromawexifudujobuvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/rekude.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/free_annual_3_credit_bureau_reports.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/brand_association_definition.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/47851475303.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/toefl_pbt_sample_test.pdf
    • https://cdn.shopify.com/s/files/1/0436/0024/8995/files/xekarapuxivofasipigiv.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_off00007006.bin
5eac3656520e8469a1525eda9e3e7caba40e9ebc83d5d26d85187672e6975520		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7006 4924 bytes
font_01_sfnt_off000080bc.bin
32baa12876aa861ce146af10431fd2ec785f61f3d770deec3e7434fddc479598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80BC 10240 bytes

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