Malicious PDF — malware analysis report

Static analysis result for SHA-256 1147efa161fe10b6…

MALICIOUS

PDF

58.8 KB Created: 2020-08-11 19:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85b46c7236c89b8bf6b3884bf053a2cb SHA-1: 228514943bc1181c781b8f8b13292336ef71eab3 SHA-256: 1147efa161fe10b689aefc4c4bfb88337cd8abec36139e85c41eae5446db910f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary link, 'https://ttraff.cc/wb?keyword=tesis%20de%20six%20sigma%20pdf', is identified as malicious. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wb?keyword=tesis%20de%20six%20sigma%20pdf
    • http://files.justplayscript.com.au/uploads/1/3/2/6/132681558/lewotisejoxu.pdf
    • http://files.bernedoodlebreeder.com/uploads/1/3/0/7/130739190/6824585.pdf
    • http://kutujom.pbgnation.org/uploads/1/3/0/8/130873851/23c7702a2d459.pdf
    • http://files.cocoally.com/uploads/1/3/2/6/132680962/tiradari_riliramivuv_fodukewadumozav_naritilili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8249/7696/files/48782683577.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/86364119429.pdf
    • https://cdn.shopify.com/s/files/1/0432/3593/4370/files/vavaguwatilusiselipeweb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/24711676377.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/brucellosis_in_sheep_and_goats.pdf
    • https://cdn.shopify.com/s/files/1/0439/9969/0910/files/58676807977.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/pivibonurejenox.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/9490835445.pdf
    • https://cdn.shopify.com/s/files/1/0440/1112/6942/files/quantitative_aptitude_questions_and_answers_with_explanation_for_ibps.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/sumetuzezepaliromeruz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/44872558462.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000098d4.bin
70c67b1918a325a56531ae1df1c4d5dae618c6aca3aefee4a19e3a373d884359		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D4 4740 bytes
font_01_sfnt_off0000a8fd.bin
e64c8ced106a6f38f012de3c3b899475124728d5e79064911b78c039d1fb1218		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8FD 12144 bytes
font_02_sfnt_off0000d094.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD094 4324 bytes

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