Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c737ceb7f7e9f4…

MALICIOUS

PDF

50.7 KB Created: 2020-08-20 09:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10d0ab922b44be995129db47253cb7e8 SHA-1: a4a4a73658746ced60056e904001754ac41efa3e SHA-256: f4c737ceb7f7e9f41f9edc639058ae3cb8ba234c290cdd0672d4ba79c654b55d
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The embedded URL 'https://ttraff.com/pify?keyword=bdmobi.+com+song' is a strong indicator of malicious intent, likely serving as a lure or redirector. The presence of numerous other links, many hosted on cdn.shopify.com, suggests a coordinated effort to distribute malicious content or conduct phishing attacks.

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=bdmobi.+com+song
    • http://files.raisingthedeadband.com/uploads/1/3/1/4/131437515/nofumibe.pdf
    • http://zebav.theamentlawfirm.com/uploads/1/3/1/4/131437792/e4974c6779fc6.pdf
    • http://jegibup.bohemiacakes.com/uploads/1/3/0/8/130814297/tajofaf-sagepuvo-nimagafowopipe-bezefutuxufa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/gutubasagojojamej.pdf
    • https://cdn.shopify.com/s/files/1/0433/8833/8330/files/21166950275.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/58423594688.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/ajax_php_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7727/files/how_do_you_convert_to_word_document_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0436/8980/3941/files/80565101816.pdf
    • https://cdn.shopify.com/s/files/1/0431/8773/2644/files/momijupulopexezamazeze.pdf
    • https://cdn.shopify.com/s/files/1/0434/3758/8646/files/ejercicios_resueltos_sobre_movimiento_ondulatorio.pdf
    • https://cdn.shopify.com/s/files/1/0438/3178/7670/files/o_ceticismo_da_f_download.pdf
    • https://cdn.shopify.com/s/files/1/0449/4236/0744/files/precalculus_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/35346528924.pdf
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/49385541706.pdf
    • https://cdn.shopify.com/s/files/1/0428/5736/5670/files/c_singleton_example.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/
    • https://cdn.shopify.com/s/files/1/0429/8833

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007da0.bin
cb5c44b7ec8d173613d1243e465e950b023425519a50b85c555601a55be9f162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA0 5140 bytes
font_01_sfnt_off00008f0f.bin
27a11d6a609643d211abd00ba1d16a22c578d83a9b4d971f22f7dfc523206dd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 14492 bytes

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