Malicious PDF — malware analysis report

Static analysis result for SHA-256 691d46a2fd9bab5a…

MALICIOUS

PDF

43.3 KB Created: 2020-08-10 12:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32e2b1cb1f5630bc7ea1d686e147c610 SHA-1: f0c3e67e4ad3d03e1c3531c311c0312aa4f175cc SHA-256: 691d46a2fd9bab5af09fa13beacc80ab9960abb1ca705605b9dc817663179018
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a redirector, which is part of a link farm designed to host numerous PDFs. The primary malicious link, 'https://ttraff.cc/pify?keyword=cover+letter+sample+pdf+in+pakistan', is intended to lead users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a malicious intent to direct users to external, potentially harmful, resources.

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.cc/pify?keyword=cover+letter+sample+pdf+in+pakistan In PDF document text
    • http://files.535aussie.com/uploads/1/3/1/4/131406086/wujoxokebu.pdfIn PDF document text
    • http://files.aliennate.net/uploads/1/3/2/6/132695200/4522484.pdfIn PDF document text
    • http://files.ontariochristianchoir.com/uploads/1/3/0/7/130775347/kabevabigu.pdfIn PDF document text
    • http://files.mandmhomeandaway.com/uploads/1/3/1/4/131438583/vulunil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3975/8235/files/vusuremawosujarowapur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/norofigorib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/kufunizezogun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2987/2292/files/18729796296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9665/4489/files/80573585269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5154/7800/files/kelefigijerofujifitob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/gizovopovomonututuvisat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/pig_personality_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4339/5483/files/fezulorumufofodurugigas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/1932908998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/beehive_class_9_ncert_book.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be5.bin
b64ebb4010d3432f0a2c021ab379c34474616fd3a297566d96b93aac6bc875e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE5 5216 bytes
font_01_sfnt_off00007d95.bin
ea477b6d671b3e09ebd47f2bfbe5ad6400aebf12c7ec2ea5cd96e5397fb3b9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 10196 bytes

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