Malicious PDF — malware analysis report

Static analysis result for SHA-256 70806fd984a761da…

MALICIOUS

PDF

52.4 KB Created: 2020-08-25 18:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7df3ed7561c9643683867ef2cd65d5d4 SHA-1: 7f5162f0fef15b87e87564438089cc87305ddf2e SHA-256: 70806fd984a761dae2d6c474e6760f1ae0a80f0adf0c53c8c93a50c054f0f792
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high number of embedded links, many of which point to a redirector URL known for malicious activity. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting a lure to external malicious content.

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=prince+lionheart+wipes+warmer+user+m
    • http://dawuxejop.tavisdupreez.com/uploads/1/3/1/4/131438304/migakiwutekufalawez.pdf
    • http://files.gobrethren.org/uploads/1/3/1/3/131384301/telazufexalamix.pdf
    • http://files.annagalatirealtor.com/uploads/1/3/0/7/130776718/979473.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/67647153060.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7975/files/bazubakudalasope.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/haematology_all_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/nunivujivovazukeke.pdf
    • https://cdn.shopify.com/s/files/1/0433/0681/1550/files/metformina_usos_para_bajar_de_peso.pdf
    • https://cdn.shopify.com/s/files/1/0450/7241/6931/files/53142912678.pdf
    • https://cdn.shopify.com/s/files/1/0434/3241/1298/files/38334731979.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/cambodia_daily_newspaper.pdf
    • https://cdn.shopify.com/s/files/1/0443/5696/0412/files/police_report_waukesha.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/melhores_livros_para_aprender_ingles_sozinho.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/kigik.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/6146908522.pdf
    • https://cdn.shopify.com/s/files/1/0461/7329/0649/files/segudafisajarofoziz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008022.bin
e12880c2296292f2fcdeb4392338638c2a0a44f7acf7683f9173bcde401aa282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8022 5148 bytes
font_01_sfnt_off00009170.bin
3c706ab58130c373beda10c4b61383b698dc4df172c4a6f94559c921a970cf46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9170 10724 bytes
font_02_sfnt_off0000b5da.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DA 4324 bytes

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