Malicious PDF — malware analysis report

Static analysis result for SHA-256 26536d35c70e0cae…

MALICIOUS

PDF

41.9 KB Created: 2020-10-19 20:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 66eac7b2772d40339a459aea08769729 SHA-1: 80f6cf2ec43d28b4c55ef6a38ea3d188e3ac28b8 SHA-256: 26536d35c70e0cae8ef30dc0afa91aa0194cd5a53b0c9c45a2f0108a8d3bb0fd
102 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which is flagged as malicious and leads to redirector infrastructure. The document body, though partially corrupted, contains urgency lures and references a 'parent guide', suggesting a phishing or scam attempt. 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?keyword=holmes+and+watson+parent+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f8d4fee41c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f8810da508f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f8d623d65f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f874fe42acb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f873f2b5ce22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5f8d693437535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5f8a1dbacc280.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/1/0429/1123/6259/files/graco_swing_and_bouncer_target.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/pugiveputowomotiwikej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/john_lewis_sacha_sofa_bed_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a132b567-3fa8-458a-80b2-8f57bc3969b2/94681048144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/nirugejejuteraketebedopij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6179/1905/files/docusate_sodium_davis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7337/1300/files/shelf_life_of_spam_hormel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3167/3024/files/79142939408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/122096be-199f-4fa1-8b6d-765404dc83a5/78329701271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f37016-eb37-41cb-b08d-00750817b9da/rirawexek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40f5a44-cf08-4e96-adca-b1ad54270cf8/50688282511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec10827-9ae2-46a3-b9a6-5243372a7dd1/basepapufikamewesubef.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_off000064a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A7 5332 bytes
SHA-256: a76d6ec9ab40b0f7a98044110eb2cba72ac4f103eae67ddce2f78e38bf6956d7
font_01_sfnt_off000076bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BC 10468 bytes
SHA-256: 6afdd49aadeb716b7551f31dbe518c87b5471e6d19eca89c068a80524d6427e9

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