Malicious PDF — malware analysis report

Static analysis result for SHA-256 116bd5d83f870a71…

MALICIOUS

PDF

45.2 KB Created: 2020-08-17 10:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b4d9d9ea56c07935ab6eb174a8c17b2 SHA-1: 96d2fb2b99396dbfd4841f024d800efd27185590 SHA-256: 116bd5d83f870a713c39ecaf4a8bb00961e2b2f932dfcb15590f97a7a6a1382c
154 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a link to known malicious redirector infrastructure and a link farm of external PDFs. The document body contains obfuscated text and embedded URLs, suggesting an attempt to disguise malicious links. The primary malicious URL identified is https://ttraff.ru/pify?keyword=distilled+white+vinegar+msds+sheet, which is known to host 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=distilled+white+vinegar+msds+sheet
    • http://besizajix.mooneevalleymagazine.com.au/uploads/1/3/2/8/132815367/sedax.pdf
    • http://jumugale.glassfenceusa.com/uploads/1/3/0/8/130874472/porivivaxekixafi.pdf
    • http://fibapa.mrschabo.com/uploads/1/3/1/3/131383839/711003.pdf
    • http://files.ladyannestrunkomaha.com/uploads/1/3/1/6/131636807/588a702b235eda.pdf
    • http://files.mrsdeanslab.com/uploads/1/3/1/3/131382955/e2e0b7b9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/worovikorodebeluzogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7840/2723/files/34419324809.pdf
    • https://cdn.shopify.com/s/files/1/0436/9940/4965/files/62037158139.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/xuwabedemukibupe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/nikudomutivejotufepejej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4859/files/19205227502.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/asus_vivobook_k570zd_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/2155_john_deere.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/fowobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/81202622604.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/lifavegujonododig.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/tesijiwigafokatagobonox.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/lamuba.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0042/files/kunedigijaramofupebozogos.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_off000072e4.bin
23d67352f8d80a55dfa5067f7960a83203a2ee4e36da2089e4eb3ab2b0ce1717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E4 5392 bytes
font_01_sfnt_off00008519.bin
56626a217cb4ec4342ed526245beb694635f72b7de213dba1d143cd6b151a12b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8519 10156 bytes

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