Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9b449a6ce177fd…

MALICIOUS

PDF

43.0 KB Created: 2020-08-17 02:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b9a893eba52a972c751e33021109483 SHA-1: 1772259e6177483a95d8ff99de5c340a4c03f836 SHA-256: 1c9b449a6ce177fdad44200f805421cd10e1efd2f27a0276c839391689684049
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a driver download for 'amd a4- 9120 radeon r3'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the link points to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates the PDF is part of a larger link farm, suggesting a broad phishing or malware distribution campaign. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=driver+amd+a4-+9120+radeon+r3
    • http://files.busedu.org/uploads/1/3/2/7/132711999/076e548b74.pdf
    • http://files.carolynodoherty.com/uploads/1/3/0/7/130776168/7cee3b4f9e4b55b.pdf
    • http://files.theharbourcc.ca/uploads/1/3/1/8/131856394/nonidupifuzog-rejux-panapi.pdf
    • http://gaviz.servantsofthestreetsfwtc.com/uploads/1/3/1/3/131379951/gekelimaj.pdf
    • http://files.boatdocksolutionguy.com/uploads/1/3/1/4/131407737/4049049.pdf
    • https://cdn.shopify.com/s/files/1/0432/8508/6364/files/jekeravejat.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4527/files/light_feather_classic_wow.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5797/files/72291828844.pdf
    • https://cdn.shopify.com/s/files/1/0437/3905/4231/files/us_antitrust_law.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3090/files/83184333974.pdf
    • https://cdn.shopify.com/s/files/1/0437/5838/7349/files/fufategenopuzusiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/ipad_pro_pencil_markup.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/jufebimolexi.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_off00005b89.bin
a3b9bf9bbff1d6c76a0d83b44b4d55d68dc29361a61412d287cb41b64a0f8dc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B89 5292 bytes
font_01_sfnt_off00006d83.bin
a25f68f7c08745326e428abb4aa341e8591b3c33846fb7eb1f0a83aa7651f6bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D83 10448 bytes
font_02_sfnt_off00009137.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9137 4324 bytes