Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a53405957a5352c…

MALICIOUS

PDF

56.1 KB Created: 2020-10-28 21:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e822088af9122c832fdd7fab9996d282 SHA-1: 22f9590bb4139ae048550753006c1cb2b34608b5 SHA-256: 9a53405957a5352c69900c818d83934df9cb153c9d707b85123ae7068bb12beb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/strik?keyword=gamma+alpha+psi+fraternity, is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain the malicious URL.

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://ggtraff.ru/strik?keyword=gamma+alpha+psi+fraternity In PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/1e35e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_5f91286ba1d57.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/3669821.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/fezimexebitodugivife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411273/normal_5f982bb575dc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f88d81530bc5.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/5948158.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/7119677.pdfIn PDF document text
    • https://zovodexipelozas.weebly.com/uploads/1/3/4/4/134401167/678989.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/1642371.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/fosaravufe_donimomes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d0e05a-22b8-4a46-8301-0f6d14df2351/rovafozuxupanoruxaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/suwofixiluzinuguda.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/kobedupasosedewodomopise.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/21451903369.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/63881940379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/211d5375-b297-49b2-9cb7-6f0b6ce0b081/76983353880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/209f80b2-cd78-4765-9204-b994909e9fdb/14429859261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c14519-65d2-409c-82cd-8ffbd66871c3/pugelejofukolawojet.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/67462346913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68639328-a58e-4ab8-80fe-b64629b9a023/26410846306.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/pokijinitikosaxuwolozo.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/31204416477.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a645.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA645 24016 bytes
SHA-256: a70b1cb771ccf8fec0ae6a4eaafd3a85ec3cfc3a3b7b9489267427052e2d4d32
font_00_sfnt_off00006d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D74 5272 bytes
SHA-256: 7a2a2f775c0dce1e567dbced6e78ab9157368d63802df1ddca31f80655846165
font_01_sfnt_off00007f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F40 11744 bytes
SHA-256: ff6c1c9be518d1d5a226d884e63950eb153b921a6fa0b76c69c8178a1fe6f084