Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e06717ca829ebaf…

MALICIOUS

PDF

47.9 KB Created: 2020-08-19 22:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9d23da267dd5c74cff3d7fd8eed0cc SHA-1: e8f32984eeb5fe080215d77bb0a9dfa19f9ad58a SHA-256: 0e06717ca829ebaf7f18f36f13a01c262ab7efa9ddf72262476b021a7c2af325
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic identifying it as a link farm pointing to malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bhutan+tour+guide+marry+singaporean, which is likely used to obscure the final destination. The document body, though partially corrupted, contains metadata suggesting it was generated by wkhtmltopdf, a tool often abused for creating malicious PDFs.

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.cc/pify?keyword=bhutan+tour+guide+marry+singaporean
    • http://modobel.tp4seniors.ca/uploads/1/3/0/7/130738909/paxobiladaxuladimor.pdf
    • http://files.gonewiththewindgoats.com/uploads/1/3/2/7/132741397/pudenefexiga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6146/8567/files/47893873329.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/74831113118.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2726/files/polifef.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/59718179798.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/51546854943.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/spatial_databases_a_tour.pdf
    • https://cdn.shopify.com/s/files/1/0444/2842/7431/files/vejeketakawawule.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/fixitiweluzijajosax.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/twin_size_extra_long_bed_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/bamedetaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/20556910993.pdf
    • https://cdn.shopify.com/s/files/1/0437/1841/0394/files/byod_security.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/21391040230.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/24486956662.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068df.bin
59f446d3c282f0b3e6d8270032a7df5341d86e0b4db950c47523477a0d5c3e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DF 5492 bytes
font_01_sfnt_off00007b67.bin
50b0e0a36981b16b6aa7e62c0d99df2f04afed6110469564e1743400622002cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B67 10020 bytes
font_02_sfnt_off00009dde.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DDE 16036 bytes

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