Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad7a0d3b5cb90b9…

MALICIOUS

PDF

56.0 KB Created: 2020-08-06 13:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 908659834e0f62d4b22339d2ffb0b835 SHA-1: bcfde93246a3de61b240e0d85103190ca406282d SHA-256: 5ad7a0d3b5cb90b9d2ebad42e59b26637d113b51cc34c5e0e84dd4bf7b478161
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, ttraff.com, disguised as a translator tool. The document body and embedded links suggest a link farm or phishing attempt, aiming to direct users to malicious sites. No scripts were extracted, but the presence of numerous external links, including one to a malicious redirector, indicates a high likelihood of malicious intent.

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/pify?keyword=traductor+de+aleman+a+espa%25C3%25B1ol+pdf
    • http://files.skirrowdesign.com/uploads/1/3/0/7/130775154/fazefudusev.pdf
    • http://files.exchangersltd.com/uploads/1/3/2/6/132696077/xiwodewuru.pdf
    • http://files.purensimpleohio.com/uploads/1/3/2/7/132710689/jobivusi_xuvapubum.pdf
    • http://files.sherirobersonhorsemanship.com/uploads/1/3/0/7/130740141/lebokolofisu_baxavut_jezik.pdf
    • http://files.cultafrica.org/uploads/1/3/1/4/131406811/2669175.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/51584560463.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0220/files/31302933273.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/honeywell_t8112d1005_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/tuzok.pdf
    • https://cdn.shopify.com/s/files/1/0430/6416/4506/files/wabefenidik.pdf
    • https://cdn.shopify.com/s/files/1/0432/9340/9438/files/letosex.pdf
    • https://cdn.shopify.com/s/files/1/0447/4303/2983/files/generalized_epilepsy_with_febrile_seizures_plus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/desosomojakiridipusina.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/zimegobazewuralolekapobaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/41899161967.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/75205647252.pdf
    • https://cdn.shopify.com/s/files/1/0428/2259/8823/files/oxymoron_download_zip.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000647c.bin
950ba336d9b411dc2d508c9300240a65ab62ecff5aea7f80b5793f77cee8002c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647C 3960 bytes
font_01_sfnt_off000072cc.bin
9d4fe8df17c621867fb266a90fb4cfeba601f4019f491a5a2c3bb348cc9becf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 5296 bytes
font_02_sfnt_off00008469.bin
fc2582250c9c33efb388ebd8cbac08311b83184e66ffb50ee9931bee81ba5d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8469 11248 bytes
font_03_sfnt_off0000a929.bin
d6e49cffd67f5b7b107e39c39e46f094c659f363955228a09b2cc2650f9d76aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA929 17084 bytes
font_04_sfnt_off0000c1e3.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E3 4324 bytes

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