Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecfd112f79ba1aaf…

MALICIOUS

PDF

46.9 KB Created: 2020-09-18 23:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6549cda9b64337a953a8a921ff63d81 SHA-1: 4e811cbd131357989fdc5bf27b8785dc5c8a7a78 SHA-256: ecfd112f79ba1aafe57f9e321e96c6049fe14ad840934284c3cde7a37379a984
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a PDF redirector link to 'https://ttraff.me/wix?keyword=napa+return+policy'. Another critical heuristic identified a PDF link farm hosted on 'files.fortquappellelions.com', containing 30 links. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the string 'Napa return policy' and the URL 'https://ttraff.me/wix?keyword=napa+return+policy', suggesting a lure to a malicious site.

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=napa+return+policy
    • http://files.fortquappellelions.com/uploads/1/3/1/4/131453946/mefetesufidifavi.pdf
    • http://files.bellringeratx.com/uploads/1/3/1/4/131406935/bopipufizululun.pdf
    • http://files.stallaureas.com/uploads/1/3/1/8/131871424/xapoxare-tokibaxud-donolidawu.pdf
    • http://doban.villagesatlynxcreek.com/uploads/1/3/0/9/130969191/1692302.pdf
    • https://7eda3d74-364f-48c3-8a0e-4d96957d2882.filesusr.com/ugd/cdfdba_90ad4aedb7444496acbd80ed889487d2.pdf?index=true
    • https://1c761b32-480e-411b-a73b-5b3a9daa5e64.filesusr.com/ugd/ea9bdf_61c1b44ae36740638bc5db7d9cace7da.pdf?index=true
    • https://6a76a58f-da07-4b50-9287-0d4295539517.filesusr.com/ugd/565485_8fbed1fe97294fc4b29b6d4682ada4e1.pdf?index=true
    • https://6fe3e877-c746-44bb-8ef7-1eab2c5e31ec.filesusr.com/ugd/87d215_65e16f5fe9b84be3a21c96483859db1a.pdf?index=true
    • https://4ff482c3-6236-4d10-a053-26a498508cbd.filesusr.com/ugd/8d5d69_0669ea662e164323a925be27dd7f69bc.pdf?index=true
    • https://04579286-c294-4bff-bc8c-487280c1cd6f.filesusr.com/ugd/1b7c00_8284fe25e94b42adb5f95552df908f5c.pdf?index=true
    • https://059d14dd-c24c-43ec-9a36-79fd0254248c.filesusr.com/ugd/8e6e76_60d29d5fbe894c89b8bd888601f285a6.pdf?index=true
    • https://2466409e-aaec-43cc-898d-166e082cf67b.filesusr.com/ugd/2dbf5a_d7b4ef81968b4cdfad0eb5b4ed0e26b2.pdf?index=true
    • https://9704080d-9571-404d-be54-b116a60b39a0.filesusr.com/ugd/9c66ff_7f78593a851842879eafe56bf4917acb.pdf?index=true
    • https://d4a2ae12-82be-49a0-b04d-7424df0b72c8.filesusr.com/ugd/f5a024_49ed4222e3da400c820149196431f117.pdf?index=true
    • https://54ce31c7-33fe-489d-b92f-f8be918dbbe2.filesusr.com/ugd/3a38e0_85809577ab3841a7bb335f247a82b0af.pdf?index=true
    • https://fa817b11-752d-4b95-b122-fded3b8ace74.filesusr.com/ugd/a58502_3cf31b6bda9d425cbae2bba2e16630e8.pdf?index=true
    • https://3a22d37c-dfb0-4839-a069-371cce9020dd.filesusr.com/ugd/03ef8e_06d0ab208bff4d1eba05846ee2c194ab.pdf?index=true
    • https://dc99b820-f973-4c20-a9a5-5e340e392d28.filesusr.com/ugd/ab922d_b8d33502e2204e669069b4a96a357f03.pdf?index=true
    • 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_off000078e2.bin
d199b49a4190934248b498586e293a44230c8844671da6d51d48cc6b1a25ce0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E2 4820 bytes
font_01_sfnt_off00008966.bin
d7c9c0f95656cff9a420819d97eeffc5e378fd0d434eb04342b4e0769f690097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8966 10892 bytes

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