Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c30f9e98f200d8…

MALICIOUS

PDF

46.8 KB Created: 2020-07-14 18:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d7e0110955111562b07c715bac83148 SHA-1: a25e7f5c3cc124017b6a5d10f23f51d7eb5cae2f SHA-256: a2c30f9e98f200d870a4000127a4caedc0b544cbda34633ee800427c90ed005a
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 resources, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic firing indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'typhoid fever management pdf', likely a lure to attract victims.

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=typhoid+fever+management+pdf
    • http://files.magiciantomanderson.com/uploads/1/3/0/7/130776847/d0da8115f3.pdf
    • http://files.musicatmainstreet.com/uploads/1/3/0/7/130739839/davetuxu.pdf
    • http://files.cdpvetcaucus.org/uploads/1/3/1/3/131381044/tubugok_nuzikid_jebanokata.pdf
    • http://files.mega-marine.co/uploads/1/3/1/0/131070238/dopofoj.pdf
    • http://files.mega-marine.co/uploads/1/3/1/0/131070238
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/runafebunidevivewufige.pdf
    • https://cdn.shopify.com/s/files/1/0431/1590/5185/files/tugezaxijadolel.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/22084181035.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/11745732983.pdf
    • https://duzawexosusa.files.wordpress.com/2020/06/ketubetak.pdf
    • https://lawabojivek.files.wordpress.com/2020/07/54398429514.pdf
    • https://nuxizosa.files.wordpress.com/2020/06/besokoje.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/durinozube.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/17598506551.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/73178774662.pdf
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/janojifekomepuxebajoke.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/20793898176.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/fexepe.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/pivux.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_off000079c2.bin
9b2696b4ba121965f461236a4b82c68707196167c358f73c96535719a9b8dbb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C2 5144 bytes
font_01_sfnt_off00008b25.bin
6c644d3d6b40a2b31b0699c86d446efe5c2aa1c65c471fe0add1a1ce675036c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B25 10196 bytes

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