Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1a4e39c376645f…

MALICIOUS

PDF

33.6 KB Created: 2020-08-09 11:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 545458336cfd379b8fdf1f9242d68e0b SHA-1: 06f020e3e3ec642cf085a7adb740a4348d0dd44c SHA-256: 7b1a4e39c376645f2f82dc758cb3150cebc168e92b6ea4905426def3232d0cfd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to the presence of a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.com/pify?keyword=acutronic+fabian+pdf'. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on shopify.com, suggesting an attempt to distribute traffic or host malicious content. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

Heuristics 3

  • 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.
  • 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=acutronic+fabian+pdf
    • http://files.maritsaxegaard.com/uploads/1/3/2/6/132695620/mugesa.pdf
    • http://files.finksdeli.org/uploads/1/3/2/7/132741222/5b0259.pdf
    • http://files.workshoppersonline.com/uploads/1/3/1/4/131483584/likeradili-gitofomimixunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/76263548478.pdf
    • https://cdn.shopify.com/s/files/1/0433/3033/8966/files/jagolukekibovukena.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/xupatililagugareg.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/47574172771.pdf
    • https://cdn.shopify.com/s/files/1/0433/4613/3157/files/pibogikexakefurikaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/2027/8171/files/8553381086.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9173/files/5_minute_charts_technical_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7693/5068/files/83053750846.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/92816354060.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16946396068.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004763.bin
86cabae0e488c6f8c66cca0ec63e0950334b2dae6ad3c97690ade5a37f34bc32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4763 5068 bytes
font_01_sfnt_off000058ac.bin
204f042aeed62717486bd092fc77c17bca4d2967c113e9265ec0bd08c1c9509c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AC 9764 bytes

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