Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03fe07fcbb9988e…

MALICIOUS

PDF

44.0 KB Created: 2020-09-18 14:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c53fdffd0fb5b69d3b0bccf7ca5fe9df SHA-1: f96187fe36d6405aec60b21a42b6bf2e7d8ec717 SHA-256: c03fe07fcbb9988eaad733b9896096463bfd3258388ae09609e8b7569f4d64bc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=deep+magic+rune+magic+pdf', which is also flagged as malicious. The presence of a large number of links, many pointing to benign-looking files on file-sharing services, suggests a link farm designed to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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://ttraff.me/wix?keyword=deep+magic+rune+magic+pdf
    • https://37b3a439-3d79-44ad-af80-57915fdc9a65.filesusr.com/ugd/1cc7e8_871946f782a143b49eb1df74e51185f3.pdf?index=true
    • https://392245f6-ceb6-4866-9373-8c5941e52b3a.filesusr.com/ugd/a31856_5e62ceb4c80c43418bf102a079e2d7db.pdf?index=true
    • https://ccedd517-1eae-417c-a46a-3366a42cde3e.filesusr.com/ugd/b0cb2d_96708973573142ac82a5b99f9e407432.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/5165/5061/files/certificate_of_appreciation_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/wokiboxoro.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/what_does_silk_touch_do_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0438/1147/1520/files/wapazanazikixu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3480/2333/files/business_strategy_case_studies.pdf
    • https://0ee9dce1-e498-4378-bb3e-a235707709b7.filesusr.com/ugd/bd1fc0_b20e2d72ca264b369a54fd82b1abefd3.pdf?index=true
    • https://79ed7bf0-0e37-45d3-95a8-e8cfc4025237.filesusr.com/ugd/843280_7f64c6b0754440e69dd529e53165f125.pdf?index=true
    • https://00ab5f35-bff0-42f8-b3a5-9c709dd102d3.filesusr.com/ugd/d5415a_77b6626309054234a20fa04d696a9254.pdf?index=true
    • https://896da014-94e9-4478-9529-7a1b4f01bd7b.filesusr.com/ugd/a382ee_4cbddef9f26143f8a213afa5b79fa3f7.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0441/1441/1672/files/guided_reading_anecdotal_record_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7519/7346/files/wonuvujalinuvusuduvewiga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1635/files/how_to_make_a_ipo_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebedaxogatasimilore.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e1c.bin
db6f0dcd6dab37b547c5d12cc6fb03d607c92835b1dfb8dae7929f46ae7170e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1C 5264 bytes
font_01_sfnt_off00007ff6.bin
946a2182a0d09221a74b6800b8d839b0381fc06289b7a491e2d39fdc14f0354d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF6 10168 bytes

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