Malicious PDF — malware analysis report

Static analysis result for SHA-256 0693cc9687d6dec9…

MALICIOUS

PDF

46.0 KB Created: 2020-08-14 10:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a16c50e21920622af598f861c04f9143 SHA-1: 98bb222ed727119e3d5a9216c09f9a8a2e6b7ac8 SHA-256: 0693cc9687d6dec9969d10e5f9ac6ed38d30d972b1f642cc73faf39f669e889f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.ru/pify?keyword=free++song+careless+whisper+george+michael'. This technique is often used to obscure the final malicious destination and evade detection. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious redirector.

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.ru/pify?keyword=free++song+careless+whisper+george+michael
    • http://files.amy-woods.com/uploads/1/3/1/6/131606467/zugakojodotu.pdf
    • http://files.jcnjansen.com/uploads/1/3/1/3/131382797/bd36d9bfb666de.pdf
    • http://files.faithbaptistalturas.org/uploads/1/3/1/3/131381288/filimutotu.pdf
    • http://riloziwo.mojamaican.us/uploads/1/3/2/6/132682076/japudigepemidaretid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6309/1110/files/ambasciate_italiane_all_estero.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/72214081891.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/fizefikerinizobuxazen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7703/files/xidaboxunixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/9273717465.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fisebupujavilugux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/najejuguzunimubovelodu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9013/1609/files/ielts_general_training_writing_task_2_samples_band_9_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/48974175577.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0436/8901/7497/files/online_convert_jpg_to_less_than_500kb.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/fonezofegodipafuwewo.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_off00005f23.bin
b8a1546ed522cd32d5fbbb00bcb77f66b2a17a4da52e3afd6e94ef44f90f3097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 5100 bytes
font_01_sfnt_off00007051.bin
dce23770890a99c37817b37759ca6f408d1a33f36153e1d2cacd0c671d7d78e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7051 14048 bytes
font_02_sfnt_off00009c2b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2B 4324 bytes

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