Malicious PDF — malware analysis report

Static analysis result for SHA-256 da903ad640cca3b2…

MALICIOUS

PDF

40.6 KB Created: 2020-08-03 17:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 039863dbb2f694a5924d921b625315a3 SHA-1: 6f49f6532ce5d3e3163b869acb2841180e250a22 SHA-256: da903ad640cca3b2d1709f7b5b694a7927e28f6e42b8f8c6f60192f801bd6fd7
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to a 'Venice transport map PDF'. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a harmful destination, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=venice+transport+map+pdf
    • http://files.fotismitsis.com/uploads/1/3/0/7/130776131/71394c404.pdf
    • http://files.darlingflorist.com/uploads/1/3/0/8/130813866/jokadejemedixurudunu.pdf
    • http://files.johnlread.com/uploads/1/3/1/3/131379639/d556e059.pdf
    • http://files.nrcm.com.au/uploads/1/3/1/3/131384208/vugerokinafipa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9231/files/tepepagadovelajeneru.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/trigonometry_angle_of_elevation_and_depression.pdf
    • https://cdn.shopify.com/s/files/1/0429/2434/3462/files/jimexiti.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/pukodi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/change_font_html.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9632/files/tamoxadulazefajubap.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/fulapaziwinobavibil.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/31880266538.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/foxejuwasujexurexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/fitidegev.pdf
    • https://cdn.shopify.com/s/files/1/0432/7967/9656/files/78162407619.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_off0000622f.bin
d0f6a15e65e9ece20d8889a95a1e8d94df253c83daa9ef63c6bbb6f4fc591266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622F 5236 bytes
font_01_sfnt_off000073ea.bin
73e9116b975e37852a839135bf4839ed8d17b03fb295f3e772b1afa50247a7e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 9936 bytes

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