Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4a022d03a11a76…

MALICIOUS

PDF

45.2 KB Created: 2020-11-07 06:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 923c36a1de0ac740e8c6d593aec6d913 SHA-1: b282e132172cb2dc4f18b07da9b11bd1f5f0cf69 SHA-256: 7c4a022d03a11a76535769453fa410fe3fadd927414cf80dd10e07d110c292ce
162 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a malicious redirector and part of a link farm, with the document body text and embedded URLs suggesting a lure related to receipts or payments. The primary malicious URL, https://ggtraff.ru/123?keyword=show+me+the+receipts+meaning, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?keyword=show+me+the+receipts+meaning In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f93283a66d24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5fa0690154f22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zikivep.files.wordpress.com/2020/11/56664064325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa6242d5-bca8-4649-afe5-d4a0392b37c9/54658550675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a58b9da-8b63-4376-a10a-2fd7462b7e17/how_to_edit_adobe_in_paint.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/14316907171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6516f4d1-6ef1-45e4-9611-0395bd86094a/1992460558.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/bloqueo_av_avanzado.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/what_does_it_mean_to_be_alive_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3322de79-c6f4-47da-a6ef-c200cb0773c4/jitobisumixexivokagogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/202de665-df05-4b36-b9b7-0c2e7039aaf2/hulu_boxcar_children.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/angina_estable_e_inestable_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/uplift_summit_high.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/centroid_and_moment_of_inertia_of_common_shapes.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_off00007037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 5508 bytes
SHA-256: f8613929472904fe58ac1bc5f0c271c0f2557b793464c98ac0c8a6e13cb452ee
font_01_sfnt_off000082dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DD 11116 bytes
SHA-256: 1db0a35ad8780a6263d75afd12b04145cb34ce3b543a7c18349a005fc69507ee

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