Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc38f0443cd3ab62…

MALICIOUS

PDF

41.2 KB Created: 2020-08-13 21:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91c40e90fce731edbfbe65c813dc834e SHA-1: 6b4ed3508fa90f77bb62e8069f262e7abfa8d637 SHA-256: fc38f0443cd3ab62ef1fd5700915039564149cca5f006a578fc48d470651a184
120 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=java+calculator+free'. This URL is presented within the document body, suggesting a social engineering lure to download a 'free Java calculator'. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or malware.

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=java+calculator+free
    • http://files.sankofaedgroup.org/uploads/1/3/0/9/130969744/zidubonigam.pdf
    • http://files.marilenasadventures.com/uploads/1/3/1/3/131379553/abfd356fff07.pdf
    • http://files.1stucc.net/uploads/1/3/0/7/130776103/98b6099bfa7bebf.pdf
    • http://files.aajamn.com/uploads/1/3/0/7/130740571/leseronezis_wirogaramemi_dofufira.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/romeo_and_juliet_act_2_questions.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/27615318268.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9452/files/zetizuxomixegiketasiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/5838/0446/files/cause_and_effect_worksheets_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/4871/3896/files/romopegumirenurepomowom.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0923/files/xivebimexozurojamesuwedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/tizipalamasapab.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/nebosotisibeserisumawezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/77067962074.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/33105127878.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/88695312564.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_off000064fa.bin
52470ee58dd5ba7ba22b0213fcf6daf7e21d5a9e0d4a37660fdd6c27d3d219b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FA 4748 bytes
font_01_sfnt_off00007536.bin
8536fe1149f48cf09c51d3e0f6f61f2f7796ec7f99c56149de707319691a7830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7536 10176 bytes

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