Malicious PDF — malware analysis report

Static analysis result for SHA-256 74afd5cbed1af870…

MALICIOUS

PDF

59.6 KB Created: 2020-09-21 04:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 077359a001a8a12972b234f5776b762e SHA-1: ad29dfdeef6de83232858c435dfaa71c6e8c7d49 SHA-256: 74afd5cbed1af870c152789a8e834982908e03d23e0b0a6bcf86c27627185a77
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.me/wix?keyword=ap+comparative+government+iran+study+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it. The presence of a large number of external links, many pointing to Shopify domains, indicates a potential link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=ap+comparative+government+iran+study+guide
    • http://files.winonaffa.com/uploads/1/3/0/7/130739204/vuvubofudesafa.pdf
    • http://wetivevu.hodgmanrecipes.com/uploads/1/3/1/3/131378850/zofajevobex_lawodovozoxemu_taduviku_zutoxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/94268649984.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/7875560408.pdf
    • https://cdn.shopify.com/s/files/1/0432/8348/0736/files/65983666496.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/80138646689.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/base_de_datos_en_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/13875486412.pdf
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/wirobasurebenovuzanurabe.pdf
    • https://cdn.shopify.com/s/files/1/0465/3491/8302/files/the_wealthy_barber_returns.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/clases_de_enlaces_quimicos_y_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0457/9183/8364/files/navy_counseling_chit.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/alg_2_antrag_berlin.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0729/files/mathematics_questions_and_answers.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_off0000a9aa.bin
a0acf643dffb244514665a1b546c2b40b4344d2ced02874ca55fc7c89ea4c4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9AA 5512 bytes
font_01_sfnt_off0000bc60.bin
c6cd9b3c24e024e802588593c82531209e1ad0b8e1cf05eca10768cac7de47a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC60 10856 bytes

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