Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5707fee8f315cf…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 15:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 677a6720890a0616a0fe13e6f3c50cf2 SHA-1: 3deff478ca975e1f46a2928371a4709ed0d24397 SHA-256: 1c5707fee8f315cf920ec894f5304a5da645a0937cd9faf91e1fd2e6390edc5a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a keyword related to academic content. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to various PDF files, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the presence of the malicious redirector and the link farm structure strongly suggest a phishing or malicious content delivery attempt.

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.com/pify?keyword=formalist+literary+criticism+guide+questions
    • http://jozozegip.pnc1948.org/uploads/1/3/2/6/132682156/2cb35e72.pdf
    • http://files.nsanys.org/uploads/1/3/2/3/132302718/748ade47.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/30037711428.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/tewavobawisateleda.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5290/files/mifijurogiregexux.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/mean_median_mode_frequency_table_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/gemosuwujogizikiji.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/dhs_family_child_care_forms.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/96634836453.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/baxipuwapasudipuwumut.pdf
    • https://cdn.shopify.com/s/files/1/0449/7879/8750/files/fojitabes.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3580/files/60535301426.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/rodiwudawokutedavuvigaxuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/zilojo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/error_9006_iphone_restore.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_off00006316.bin
aa3ccf7a014773d58ebe78e4c14ade2a6f1f49ea605df322c68b950c532e132b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6316 5444 bytes
font_01_sfnt_off00007579.bin
518ae089f67110fef29db9eecb30574ef471eb3f7efdd70114cff59a09776903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 10120 bytes

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