Malicious PDF — malware analysis report

Static analysis result for SHA-256 02268fd6fd2f91a9…

MALICIOUS

PDF

53.4 KB Created: 2020-08-15 03:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 213a2fe4faeea27b52276c83850e5cac SHA-1: 1f988ba519c5e009774037ab5c3175cb90abafe4 SHA-256: 02268fd6fd2f91a9acd04f4862d5cd6a6916e28a53198c31786f3aa78815b7e1
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 redirector infrastructure or unknown domains, indicating a link farm or phishing attempt. The primary malicious link identified is `https://ttraff.ru/pify?keyword=chess+guidelines+for+beginners`, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting an attempt to drive traffic to malicious sites.

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=chess+guidelines+for+beginners
    • http://files.freemanyouthservices.net/uploads/1/3/0/9/130969695/kilexeda.pdf
    • http://files.eyretonponyclub.com/uploads/1/3/0/9/130969153/7674e0e5b687.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/4670/6088/files/tadukowagojulosediwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/60194439212.pdf
    • https://cdn.shopify.com/s/files/1/0434/6567/0806/files/98959095624.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/wifawikiwazawepuxez.pdf
    • https://cdn.shopify.com/s/files/1/0437/7480/4119/files/piwobawadutu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/rolobonifoledoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/35989044956.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/50990843640.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/abstract_reasoning_test_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/balancete_de_verificao_exercicios_resolvidos.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070dc.bin
c359c86ded766fe482b8486db05cddc44ed5c545e1dd143ec837129d957c1a00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DC 4924 bytes
font_01_sfnt_off00008183.bin
2e75be11fc766dc766659f4db3ed688843c48be5b7af9eb00070fda2a547f3cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8183 10424 bytes
font_02_sfnt_off0000a56d.bin
275d0ef8f619a30f75d5b67021c85ffe51dbf44d82a44ecb2d07128ff93f9399		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA56D 16112 bytes
font_03_sfnt_off0000ba3c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA3C 4324 bytes

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