Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a957c744e8cab48…

MALICIOUS

PDF

50.8 KB Created: 2020-08-04 03:37:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f9b730cfbce0d7bc9e34b78a08e8186 SHA-1: c2086b27d4dce13b61abaf8dd030cb1683fda29f SHA-256: 8a957c744e8cab4815b1c99268b47c5cb40f65148b56298d07f2ef3041006d2b
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=open+pdf+file+in+browser+c%2523'. Additionally, another critical heuristic indicates a PDF link farm, with numerous external links hosted on cdn.shopify.com and other domains. The document body also contains the malicious redirector URL and a list of other PDF URLs, suggesting a lure to download or view further content, likely malicious. The presence of a download button heuristic further supports a malicious workflow.

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=open+pdf+file+in+browser+c%2523
    • http://files.frederickjbrittain.com/uploads/1/3/0/7/130776327/1feec7adc09.pdf
    • http://files.sportfishingdalsland.com/uploads/1/3/2/6/132696274/fd45c.pdf
    • http://xelubo.thelightingsummit.com/uploads/1/3/1/4/131454024/3369954.pdf
    • http://files.emnote.org/uploads/1/3/0/8/130814124/39dbc138.pdf
    • http://files.elisemoran.com/uploads/1/3/1/4/131452997/4065651.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/23098549828.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6163/files/wakeze.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/55779072010.pdf
    • https://cdn.shopify.com/s/files/1/0435/4863/9391/files/ryobi_31cc_trimmer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/50507146723.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/74743041475.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/xonaminatowuson.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/jefutiviwuxamelilej.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/biviluxon.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/adobe_cs6_master_collection_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/86835329978.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_off000088d4.bin
1beca3628743e28366db5ca0ea1c0afb6354ad78de454e3c0f32daf75a0b8ccf
pdf-font-stream PDF embedded font (sfnt) at offset 0x88D4 5196 bytes
font_01_sfnt_off00009aa3.bin
bd93a359272232614e4a2bff4276de2b18bacd2a087a81985315b654c13b5835
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA3 10332 bytes