Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbea47095e1ac98b…

MALICIOUS

PDF

40.6 KB Created: 2020-08-06 01:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b62b3b622d22a14371e2e7af9ad0dc6b SHA-1: ce9ddf8f9e8466efa89f78cedc52374ccf2e0814 SHA-256: bbea47095e1ac98b02d093a7de0ea9f69bb91e76b9c13917c669c3a876a17453
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One of the initial links, 'https://ttraff.ru/pify?keyword=alveolos+funcion+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to lure users into clicking through a chain of links, ultimately leading them to malicious infrastructure.

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.ru/pify?keyword=alveolos+funcion+pdf
    • http://files.lindsay-hamilton.com/uploads/1/3/0/8/130813782/5535046.pdf
    • http://files.charvalley.org/uploads/1/3/1/4/131437532/2288647.pdf
    • http://files.learningtreepreschoolsd.com/uploads/1/3/1/3/131379312/5438811c58550.pdf
    • http://files.jd3radio.com/uploads/1/3/0/7/130738614/ae1d5d7f.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/weligomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/purifamavomugoxusupedilu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6558/0437/files/central_limit_theorem_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/2938/8699/files/1066063580.pdf
    • https://cdn.shopify.com/s/files/1/0434/1845/2120/files/72027397768.pdf
    • https://cdn.shopify.com/s/files/1/0431/0299/4586/files/chemistry_notes_for_class_11_sindh_board.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/gulapifeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/tizezekafuzofegedemeduda.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/john_deere_320d_specs.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/nadikasavituvurem.pdf
    • https://cdn.shopify.com/s/files/1/0440/5942/6968/files/economic_census_2020_exam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/bametamurikosasojevun.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/mechanism_of_benzimidazole_synthesis.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_off00005fe6.bin
475808d94a57dee214b63aa23a0fbcdeeb53057197c32de1159b27524f39f827
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 4892 bytes
font_01_sfnt_off000070b3.bin
c643e60020ee2848e66918d2914aee7d3033e9b99429cc8802facfc08189986e
pdf-font-stream PDF embedded font (sfnt) at offset 0x70B3 10896 bytes