Malicious PDF — malware analysis report

Static analysis result for SHA-256 15166de029c03bde…

MALICIOUS

PDF

48.2 KB Created: 2020-09-17 05:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79ae56897ee3d74b5748b171898c37d1 SHA-1: c22eee27bdafd10f7d4f8048f36bbbd8336692d2 SHA-256: 15166de029c03bdec7a4915826bea43f99940d77f5fd4867fc680966ac4a0265
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading software, aligning with the malicious redirector finding. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=faceniff+pro+apk+download
    • http://files.shaochihhung.com/uploads/1/3/1/8/131871994/xokoxiwar.pdf
    • http://kuvugotu.musictalentofcleveland.org/uploads/1/3/2/7/132740435/veworidovaxenek.pdf
    • http://files.dwightjamesiii.com/uploads/1/3/1/8/131856713/9379349.pdf
    • http://files.giannaenglert.com/uploads/1/3/2/6/132682167/varuzijuk.pdf
    • http://rotizi.olrc.us/uploads/1/3/0/7/130776861/danof.pdf
    • http://files.anandayogawithkaren.com.au/uploads/1/3/2/6/132695525/rojejuvulutipowoxef.pdf
    • http://files.carinagarciasscorner.com/uploads/1/3/1/4/131437474/verozizoxodenikowe.pdf
    • http://files.jackiehelderdesigns.com/uploads/1/3/1/4/131483281/6011937.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://aacbd4f1-05cf-40c0-a2d2-6be1a62b96df.filesusr.com/ugd/b85eb0_e3182c0b73cf49868d4ba088890f272f.pdf?index=true
    • https://2c5fb588-3f2e-44ee-90fc-65aa23104d48.filesusr.com/ugd/b444d4_4fef0200ff904584bb4007d30cc7d0be.pdf?index=true
    • https://f7b39daf-8f83-42d2-bc40-f49c641c17f8.filesusr.com/ugd/eb6612_696620780b484bf3a4a8562f7ad2d24b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/deaconess_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/60685470370.pdf
    • https://cdn.shopify.com/s/files/1/0434/1409/3986/files/apertura_democratica_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0432/1683/0632/files/devugoxogulejixegut.pdf
    • https://cdn.shopify.com/s/files/1/0439/5424/1694/files/givej.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fa1.bin
0789facdc89558fdda920199f5a28621e0affc62577caebd6e066f14f145a20a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA1 4792 bytes
font_01_sfnt_off00007ffd.bin
cec95306aa238e521fd3f26a661ea4beb334d48a2a727769703f2cf3741b856f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFD 11196 bytes
font_02_sfnt_off0000a626.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA626 4324 bytes

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