Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaec855970ebf584…

MALICIOUS

PDF

45.3 KB Created: 2020-10-15 17:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e87867626088240bcaeaffae2b07cade SHA-1: ea8956f4c6aaac042dbffd3aef461d666363d1c4 SHA-256: aaec855970ebf584b7c54cb65cb3ab3daaabc717c89eb829240d03bb7837c1c7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify and other domains, masquerading as a link farm. One prominent URL, 'https://gettraff.ru/pify?keyword=call+of+duty+mobile+android+revdl', is flagged as a malicious redirector, indicating an attempt to lead the user to malicious content. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/pify?keyword=call+of+duty+mobile+android+revdl In PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/9013956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f875d10a86ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f88545132cbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f87816f3759c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f87029ca602a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f873d936ce80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f876a500e719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8771f4c2e02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f87590f04012.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/1/0430/6042/8962/files/51015061683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/serial_unit_filing_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0642/6266/files/86303866808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4460/4584/files/racial_segregation_in_to_kill_a_mockingbird.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/area_to_perimeter_calculator_rectangle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/vemusaveparujubeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9052/3813/files/34940549476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2900/7002/files/48580688749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3655/9528/files/2_step_pattern_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3484/8675/files/16962577380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/vision_test_7_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5269/9300/files/sierra_243_load_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/17857601034.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_off00007421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7421 5084 bytes
SHA-256: 0ed13816acd7ff170d5cee3b18a15073c4119d0df1d3672447c7c82b0d6b808f
font_01_sfnt_off00008561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8561 10052 bytes
SHA-256: 7f902626654ac599afabce814f5ff18edcb2e38d6bb1fa188221e0d9a92d4703

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