Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadde5de91de500a…

MALICIOUS

PDF

52.2 KB Created: 2020-08-18 21:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 353dcb1162c8ad16a392519b78433fcd SHA-1: 49480101fd453e20d5128be76b5ccbd2df7f8c76 SHA-256: eadde5de91de500a5124642572c9598cf70121fbb1d2831d329bf2c5421b34b9
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. The PDF also features a link farm, with numerous external links, many hosted on Shopify, likely to obscure the malicious destination. The primary malicious URL identified is https://ttraff.com/pify?keyword=ajay+atul+2018+song.

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.com/pify?keyword=ajay+atul+2018+song
    • http://files.mrdeleonardis.com/uploads/1/3/0/9/130969762/e85e6cff7f42.pdf
    • http://files.actionautoracingllc.com/uploads/1/3/0/7/130775588/rumefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/dirowakewotuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/42619916282.pdf
    • https://cdn.shopify.com/s/files/1/0435/3038/7607/files/tuxemevumixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8497/2183/files/pogufubunanemajaralub.pdf
    • https://cdn.shopify.com/s/files/1/0429/4131/7276/files/953228354.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/bisedopuriduwodubijixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0793/3603/files/les_accents_leon.pdf
    • https://cdn.shopify.com/s/files/1/0437/6736/5794/files/55195581632.pdf
    • https://cdn.shopify.com/s/files/1/0448/3717/5456/files/61767146738.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/16196342979.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/tablatura_bohemian_rhapsody_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6242/files/wapabogasaxodexotezozor.pdf
    • https://cdn.shopify.com/s/files/1/0430/2956/1495/files/les_maladies_cardiovasculaires_dfinition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072b6.bin
a7843ed5ea3eef28eebacc3b04ecbc6148c2433b2f242715033f0a756d674c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B6 5444 bytes
font_01_sfnt_off0000855e.bin
419a2a2a474d47a12ababa5fcd776537889d24f17da7819543e43c1dce9c9f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x855E 10588 bytes
font_02_sfnt_off0000a995.bin
4abc62f87418a5b011b836beb05a23de4db3bfa4f28ff3f128a83eb48873f708		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA995 7112 bytes

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