Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa9f1a0d3fd9f41…

MALICIOUS

PDF

42.6 KB Created: 2020-10-31 03:57:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a043981164e03ffcd06f5767d191ef8b SHA-1: 1c6818f865176cd493209a015c4ac750060d59c7 SHA-256: 2aa9f1a0d3fd9f417e6be693bb839c3a5d01f3023d7e7891136fe830eed53a46
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a football schedule, likely serving as a lure. The ML classifier also strongly flagged this PDF as malicious. The embedded link is the primary indicator of malicious intent, likely leading to a further stage of attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/aws?keyword=arizona+christian+football+schedule+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383302/normal_5f8fbe151447d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_5f96d02740517.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/pidamid.pdfIn PDF document text
    • https://rakikamizop.weebly.com/uploads/1/3/1/4/131437254/dadawod-wanugovajusawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5f8b2ed55d045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_5f8bbc5fceae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_5f9637b9b5375.pdfIn PDF document text
    • https://lodovanu.weebly.com/uploads/1/3/4/4/134403978/541293.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6e30b26a-32a7-40e2-b224-5cc329cbbf08/relaratojorotomaxuta.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/86212494355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0929/2472/files/fukufit.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/shrimad_bhagavad_gita_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/44641139029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23321e1f-4fdd-4ac7-8ede-2e9290b4f76e/nexa_slab_bold_free_font.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2C 5652 bytes
SHA-256: 379d592a88787e18a485a60d16dfdcaba492b4d2c4b9a623504902f438451c93
font_01_sfnt_off00006d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D55 9944 bytes
SHA-256: 3145b62bc1aa19f67bb5c1c03c55c4f1d76d4223c3179d4641eea6d50a6a097a
font_02_sfnt_off00008f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F85 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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