Malicious PDF — malware analysis report

Static analysis result for SHA-256 29640aa5fa408c50…

MALICIOUS

PDF

60.8 KB Created: 2020-09-17 16:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5b4b042bc8a2c7770df67cfd0a2ff1a4 SHA-1: d3dd4627d9949f216408e4d0c214d67ef52eb6e3 SHA-256: 29640aa5fa408c50a9ed7b7e057b1457aa0f3c1a0e7283271614627135555668
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL to the malicious redirector, suggesting an attempt to lure users to malicious infrastructure. 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.
  • 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.com/wix?keyword=flow+line+map+definition+human+geography In PDF document text
    • http://wopebedab.theflorecerproject.com/uploads/1/3/1/3/131379478/masedejasurekawuwe.pdfIn PDF document text
    • http://xujaxisi.iosociety.org/uploads/1/3/1/8/131871453/4094881.pdfIn PDF document text
    • http://files.tomlawmedia.com/uploads/1/3/0/8/130874382/letudubofezaber.pdfIn PDF document text
    • http://rubodet.mowaxdiscography.com/uploads/1/3/1/4/131437709/febumibidokubiz_gogepuler_jarewepa_pomapoji.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/1/0435/5771/6127/files/episode_guide_ncis_los_angeles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2204/9695/files/riledete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/6616099727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6318/8383/files/blockchain_beyond_bitcoin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/ziwevovum.pdfIn PDF document text
    • https://59c0cba4-41ba-406f-ab58-4c8b02ee03f2.filesusr.com/ugd/4cd51e_b0065de4366b4898aacde140e7501618.pdf?index=trueIn PDF document text
    • https://3501cfd1-737d-4188-8411-37250982676a.filesusr.com/ugd/d61b30_a0afd327173b4941aa0a9f905bcb43cc.pdf?index=trueIn PDF document text
    • https://d7e00c38-6120-4b2f-8de1-0bf9752b8973.filesusr.com/ugd/c722c2_e2740a03a70c4831bd281db4fa2881e9.pdf?index=trueIn PDF document text
    • https://fec15ea4-fa4b-4624-bc4a-98aa367d6ff3.filesusr.com/ugd/86319b_858356a442744076a107fd9cd1f44b5f.pdf?index=trueIn PDF document text
    • https://b4bdfb84-e04d-485d-9da0-c471df715253.filesusr.com/ugd/86319b_d5216db9c0b34c66bbd00328de101573.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000748e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748E 5424 bytes
SHA-256: 9f4a9d82a00cdfc976a07993b5fc6b2d42f2c784b22c10449ed4b32621661db7
font_01_sfnt_off000086ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86ED 12300 bytes
SHA-256: 85fd5e0bd012f413c27e3daf8cdcbe24ec3df3b64a56bb065b09c51a4f48d092
font_02_sfnt_off0000acd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD6 10104 bytes
SHA-256: a415915f3bf2af4f110a04e92a9c35e604775f2efbfec31f5d5920d5aa6f8cd0
font_03_sfnt_off0000cfbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBB 16272 bytes
SHA-256: 5a778d30dde4d91965920ac0c9996e21f55691eeea21116fcecabb5a321328c5

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