Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab19c4924633e76…

MALICIOUS

PDF

47.4 KB Created: 2020-09-05 22:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c68e96605a65e7a4b9ce7e784f5152e5 SHA-1: 60bcbbf197953b8cbae68fb4313478769df2b89c SHA-256: 0ab19c4924633e76cbca6d9612b407bdddad515537447b085ab5a04b599f12ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one heuristic specifically identifying it as a PDF SEO link farm. The primary malicious URL, 'https://ttraff.cc/wix?keyword=helo+app+love+status+tamil', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting an attempt to lure users to malicious infrastructure.

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/wix?keyword=helo+app+love+status+tamil In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://static.usrfiles.com/ugd/1decf9_43550db821d441e384f382b45469f2f2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ba3326000c4c431b9463f4676d64e347.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/374ce0_e1dcdf5b581647b6a19da300bd7a6fd5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/63022f_f42a7f26660f416882ec6c70a8dbfbb0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ff64073e6f094029b9ea28720b173fae.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/ielts_speaking_topics_vocabulary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/battery_tender_junior_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/83793455731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/twitter_header_image_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/5028/6494/files/mailchimp_email_template_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/photoshop_windows_10_gratis_bagas31.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/ataxia_cerebelosa_en_pediatria.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B79 4892 bytes
SHA-256: 425fa303d373af343663e57751efb8c7a67f63de2f2451cde2074b209f7af2fb
font_01_sfnt_off00006c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 3972 bytes
SHA-256: f57045196f5fd58596bd89a6f483c43b4ccf71ab8ee33bfa3a7719e9b31085f6
font_02_sfnt_off00007aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA5 3444 bytes
SHA-256: 26d37e63e4c661c0c39902b4632e0128aea395e17a19bd3e63a6fd6331a18c40
font_03_sfnt_off00008724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8724 13020 bytes
SHA-256: 4eea5418069f5c9767871573b4ae74183d786add2d54a8a307d30894787049d1

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