Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf382b6f9691f082…

MALICIOUS

PDF

45.9 KB Created: 2020-07-13 11:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac51e33c312073a094b560a0929fb359 SHA-1: a476eb3722d89a9c3dc76015f14cc74c38a7eb6c SHA-256: bf382b6f9691f0822afcd5960610ec27a2eef58fefc50b964dfcefb7ce90367b
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits a PDF link farm pattern, with numerous external links. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=paises+y+nacionalidades+en+ingles+pdf'. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=paises+y+nacionalidades+en+ingles+pdf
    • http://files.wow.yez.dk/uploads/1/3/1/3/131383426/9045150.pdf
    • http://files.gracewoodinbloom.com/uploads/1/3/2/6/132681293/0dccfff985717ef.pdf
    • http://files.chapelbythelake.net/uploads/1/3/0/7/130776826/1720049.pdf
    • http://files.getcompletebodybalance.com/uploads/1/3/1/0/131070895/7558312.pdf
    • http://files.nespa203.com/uploads/1/3/1/3/131381804/xiwegoluvazam.pdf
    • https://kunokedob.files.wordpress.com/2020/07/fafukagusapoxibe.pdf
    • https://xagupiraso724927385.files.wordpress.com/2020/06/lapibaguripeso.pdf
    • https://xajojerukun.files.wordpress.com/2020/06/buzeket.pdf
    • https://zimixukegor.files.wordpress.com/2020/06/xomowibinuxetuxakipu.pdf
    • https://tujozoxi.files.wordpress.com/2020/06/tupojupovukunaz.pdf
    • https://zevazodofo.files.wordpress.com/2020/07/vimimiku.pdf
    • https://gorajeg.files.wordpress.com/2020/06/675508638.pdf
    • https://wesobitid.files.wordpress.com/2020/06/vaxigilipipimexobusejuna.pdf
    • https://zunaluvut.files.wordpress.com/2020/06/piluwafemajubomivose.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/jitivoxizozakiraf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/gukiforevito.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/galuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/zesegibupaxixabazupog.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/94642600083.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/38336247107.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/38164092462.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puxatofutedixa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1958/4166/files/tovexapef.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007219.bin
b89b0fa69c3729d31e652720ff2be3e893502eb5139e5c374428a4401da5068a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7219 5040 bytes
font_01_sfnt_off0000834e.bin
33b0c582b0cfc8edb8889acd74d94108bdabd93e4d268ab3dd7d5b50056a9a58
pdf-font-stream PDF embedded font (sfnt) at offset 0x834E 11300 bytes