Malicious PDF — malware analysis report

Static analysis result for SHA-256 64945e6e2086fc6f…

MALICIOUS

PDF

42.6 KB Created: 2020-08-20 18:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de8f4cdce2869ed219c4a5ccef9f97f9 SHA-1: e5145322d308d2d0125f0a2b79f2332ed85e5eda SHA-256: 64945e6e2086fc6f2ee2d1759b7c29202b27875c48099f5c848f095e32b6257b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=weather+report+new+delhi+today'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a phishing or redirection attempt.

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/pify?keyword=weather+report+new+delhi+today
    • http://files.alfredartwalk.org/uploads/1/3/0/9/130969873/cc1c10af448f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/82185501044.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/judegesuzopo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4466/6529/files/algebra_1_chapter_3_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/jelunovitagojajiw.pdf
    • https://cdn.shopify.com/s/files/1/0461/9406/5557/files/acid_base_and_salt_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/tipupudirofoveji.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/goodreader_vs_expert_for_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0437/0671/2219/files/crimson_peak_movie_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1853/files/pandoc_markdown_to_slides.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/coldplay_yellow_acoustic.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/disabajipexetapadikosuwam.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004da2.bin
59e081104272c74a13bd8f3c6551b78ca73e76e9a8a0f82af875b4e7598dfccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA2 4224 bytes
font_01_sfnt_off00005c76.bin
a40de445365292fba1d651f8c6a5004502a98ba291fb199b1f77201fd8d41623		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C76 4864 bytes
font_02_sfnt_off00006d09.bin
64b468764a5de30c960dbc46000c77fdd370b494c09ad9bd82d1642025bc4b62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D09 9992 bytes
font_03_sfnt_off00008f3c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3C 4324 bytes

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