Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b721e0f22abaf6f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-23 12:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e444bc2b2fe7788cb0e97883f16dea89 SHA-1: f6088501f259e12982e93447536690f1aefa404e SHA-256: 2b721e0f22abaf6fd8b58cd9796ced35fb2218d44cd07a404b032ff9a493f4eb
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body contains garbled text but also includes the URL 'https://ttraff.com/pify?keyword=borbaad+all+song', which is likely the primary malicious destination. Additionally, the PDF contains a large number of embedded links, many pointing to Shopify domains, but some to unknown domains, suggesting a link farm designed to distribute malicious content or phish users.

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.com/pify?keyword=borbaad+all+song
    • http://jixosak.kansascitywriters.com/uploads/1/3/0/7/130738706/8241048.pdf
    • http://files.lavalstgermain.com/uploads/1/3/1/8/131856723/6098367.pdf
    • http://vinusiri.amybournephotography.com/uploads/1/3/1/1/131164250/porepukobiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/pefofejufoxozejaxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3539/3191/files/a_plastic_ocean_video_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/77540436539.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/nivubijumaxibivodede.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/godewuvamasogejupemoki.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/php_image_opacity.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6314/files/57904676773.pdf
    • https://cdn.shopify.com/s/files/1/0437/7283/8039/files/ncert_class_11_biology_full_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/58614123325.pdf
    • https://cdn.shopify.com/s/files/1/0431/6030/5825/files/labezebiziduson.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0133/files/62254949112.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/english_monthly_calendar_2020_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b43.bin
a0e8750c2ee0a81eb404ee90d2a783e10039379bc033c51232bcbacee53104af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B43 5180 bytes
font_01_sfnt_off00006ce1.bin
c797047e879551af4f38d439e7a958e7f767f3650826664ef6a05ccd15825ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 4068 bytes
font_02_sfnt_off00007989.bin
e3e0b34e01a68d1cc4c46a9c07c5ae368ae4cb2cad40c7f8931abe1ad9b0db00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7989 10108 bytes

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