Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3fc3514ac914f25…

MALICIOUS

PDF

42.4 KB Created: 2020-07-31 10:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffbcd43697c3bef5c9ed1f91a9dfe3e9 SHA-1: abfa4b13b7efc8c3db68db3d8f66d00e71b69881 SHA-256: f3fc3514ac914f2591e0f473a8816386bb44556c5384b6b87a0ecb84d1ee7134
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Autocad electrical pdf training', suggesting a lure to entice users to click on the malicious links.

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.cc/pify?keyword=autocad+electrical+pdf+training
    • http://files.acumeridians.com/uploads/1/3/0/7/130775918/bofomagesifetila.pdf
    • http://files.livingtechniques.com/uploads/1/3/1/8/131855992/4009195.pdf
    • http://files.corningworks.org/uploads/1/3/2/6/132695372/jinago.pdf
    • http://files.thecandlewasters.com/uploads/1/3/1/3/131398010/9636512.pdf
    • http://files.mariepascalelafreniere.com/uploads/1/3/2/6/132695546/voxarofeloju-tenenonita.pdf
    • http://files.corningworks
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/gipidonoxazonuxiratam.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/kolesi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1320/0278/files/redafid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90296180399.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/85266534785.pdf
    • https://cdn.shopify.com/s/files/1/0434/8782/1981/files/4705258867.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/72793693520.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/kuroposezumibisuxen.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/31120242268.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/3320681802.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_off000068c2.bin
4c5b193575e7d85678958080eac9d2bd6d037e16c0d617773337446b7cfb1e36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C2 5016 bytes
font_01_sfnt_off000079db.bin
5fcdf6e340898ceeab35c0fde63d982a284a5f46c3771d0d1adea9351158999e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DB 10128 bytes

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