Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1835fade5393e9…

MALICIOUS

PDF

62.0 KB Created: 2020-07-15 14:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfad438c3ae18b965cf8d96e6b19fd38 SHA-1: 9c3d38771111a5545d8a730a74925d8defd7c8a9 SHA-256: 1e1835fade5393e9f1251c453d314f3113abe7c3602b7328a754b80f63a08128
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/wb?keyword=activated%20carbon%20journal%20pdf'. Another critical heuristic indicates a PDF link farm, suggesting a large-scale distribution effort. The ML classifier strongly supports the malicious nature of the document. No scripts were extracted, but the primary attack vector appears to be luring users to malicious external sites via deceptive links within the PDF.

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/wb?keyword=activated%20carbon%20journal%20pdf
    • http://files.thirstforknowledge.ca/uploads/1/3/1/0/131070173/afdff8cc.pdf
    • http://files.connectivityusa.net/uploads/1/3/1/6/131606454/8656316.pdf
    • http://files.urbanafineartscenter.com/uploads/1/3/0/7/130776066/dozidezop-kapesa-vufodegemubo.pdf
    • http://files.idyllwildcabins.com/uploads/1/3/0/7/130740217/dojopezeluguwapi.pdf
    • http://files.100ways.org/uploads/1/3/0/9/130969048/xenekab-vafumokefugi.pdf
    • http://files.urbanafin
    • https://kekuxukexeni.files.wordpress.com/2020/07/86279680887.pdf
    • https://tawutetamazo.files.wordpress.com/2020/06/moradujejunerixodedalun.pdf
    • https://vamifawoga.files.wordpress.com/2020/07/62332795451.pdf
    • https://numewim.files.wordpress.com/2020/06/balapawufamipadi.pdf
    • https://kulomewa.files.wordpress.com/2020/06/90452465005.pdf
    • https://tixemog.files.wordpress.com/2020/06/70013415920.pdf
    • https://mugafeg.files.wordpress.com/2020/07/godevubapulipifoj.pdf
    • https://rurilaxun.files.wordpress.com/2020/06/bijemijezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/14785479577.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/wixibijole.pdf
    • https://cdn.shopify.com/s/files/1/0430/9588/3925/files/nobibujolabosanifesesimuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8013/8398/files/dovebowunelukulepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigagijewunafusigiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/barisakun.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/86541053499.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/salane.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_off0000a925.bin
3f19277c64e20b5b89f914a4b927daefad532e11b242fe3016d3bafaa88a5b7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA925 5116 bytes
font_01_sfnt_off0000ba98.bin
5caf48f8bd5ea88d8c094a3406bdda9b1676205c436e0f0cc32829b6cf44c77c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA98 16060 bytes