Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5515a83b887f4b…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 21:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac1a58aebc52c3c709c5ae3aaf44f919 SHA-1: b300c5aac3a1010aaeaf0dabea5bde84c9610b45 SHA-256: ad5515a83b887f4b5014b8c76d2cc86acc63c06dc9e0340173fdad8aed5077d1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a search result for a popular children's show. This link, 'https://ttraff.cc/pify?keyword=chhota+bheem+and+krishna+in+tamil', is designed to lead users to potentially harmful content. The PDF also exhibits characteristics of a link farm, embedding numerous other PDF links, many of which point to unknown or potentially malicious domains. The ML classifier strongly supports the malicious nature of this document.

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.cc/pify?keyword=chhota+bheem+and+krishna+in+tamil
    • http://lapolab.allcoinspections.com/uploads/1/3/0/8/130813528/selukerivasuseve.pdf
    • http://files.fdbda.com/uploads/1/3/0/7/130776407/vilozetepoveru-mumowufupewi-gekinalevu.pdf
    • http://lenuja.willisandsonsfuneralhm.com/uploads/1/3/1/0/131070786/xosaruvagagexe.pdf
    • http://fopomak.wmosullivan.com/uploads/1/3/1/4/131482975/kenebale.pdf
    • https://cdn.shopify.com/s/files/1/0446/4685/8915/files/bad_blood_theranos_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9245/files/23737203957.pdf
    • https://cdn.shopify.com/s/files/1/0435/2186/7930/files/spring_framework_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0437/7804/8162/files/biochemistry_by_lehninger_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/94672404526.pdf
    • https://cdn.shopify.com/s/files/1/0448/4136/9761/files/jamuzuvegivafuzemaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/alamo_drafthouse_winchester_menu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/papusakatukuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/acer_aspire_one_kav60_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/panezojemaralefogase.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/tunoti.pdf
    • https://cdn.shopify.com/s/files/1/0461/1332/5219/files/baby_are_you_coming_lyrics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000465e.bin
2d558d5c41b6aedbefe03afc6d6ae55a5c1f82c6954fafed966a7d41f26dd31e
pdf-font-stream PDF embedded font (sfnt) at offset 0x465E 5176 bytes
font_01_sfnt_off000057c9.bin
0515895aab2585de555e493276a4dcbdce87fd036c88ef02c8b362f96c28bee9
pdf-font-stream PDF embedded font (sfnt) at offset 0x57C9 9784 bytes
font_02_sfnt_off00007983.bin
2e1dcfa215ff7068e156f9bca6f25e666cb310e753e20272ef9c89573ef626fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7983 16380 bytes