Malicious PDF — malware analysis report

Static analysis result for SHA-256 d415808bd0d59c35…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 14:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46b5306bf7f8e198ba4805816e572260 SHA-1: 6f4cfe645e9510fca61e2b8d6173eda467eb7fc3 SHA-256: d415808bd0d59c3522a4ae372711824d48bfa34e52010746f268f01ea71bb77e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=automotive%20hvac%20system%20pdf'. The document body, though heavily obfuscated, contains the same keyword and URL, reinforcing the lure. No scripts were extracted from this sample.

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.ru/wb?keyword=automotive%20hvac%20system%20pdf
    • http://files.guthealthconsultancy.com/uploads/1/3/2/6/132695329/jivapazeranajinoxexu.pdf
    • http://files.nymeria-uk.com/uploads/1/3/1/3/131380345/wijij-dajevaripodaji-gitilikejiv-padom.pdf
    • http://files.beckymarshmusic.com/uploads/1/3/0/7/130775084/8903915.pdf
    • http://files.sunnyhillstennisclub.org/uploads/1/3/2/7/132740764/jetolo.pdf
    • http://files.obedcofcc.com/uploads/1/3/1/6/131606011/bivujarokanirenafupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6924/files/jorok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0434/1124/3164/files/58603771693.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5235/files/sefijevatafelirikabiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/97868216226.pdf
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/49556590562.pdf
    • https://cdn.shopify.com/s/files/1/0429/1277/6351/files/lumipijurovofudukovap.pdf
    • https://cdn.shopify.com/s/files/1/0437/0713/8201/files/apache_camel_developer_s_cookbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/13946435275.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/57322954339.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4930/files/79358946009.pdf
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/81749590676.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_off00007031.bin
c99a525f11b43fe4b30989a58acd643627e66c4b18f2ee8ed368d758a1dbcdc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7031 5420 bytes
font_01_sfnt_off0000828e.bin
6bdd7c53dc8d7bcde603c555ecb0245a336d43d576301d5de29cb7d9382e2881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x828E 10648 bytes

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