Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6e530f82eae926…

MALICIOUS

PDF

42.3 KB Created: 2020-09-05 09:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6844b635243cc47d747e788600dbeeac SHA-1: f07f102ce99edc5b0206703874952fb440edc743 SHA-256: ad6e530f82eae92698f11740fe80f7dd0343e8e5b3fb821be2232dfbaf4c2ad6
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'reading comprehension worksheets' and includes the malicious URL. This suggests a social engineering tactic to trick users into clicking the link, which then leads to malicious infrastructure.

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.link/wix?keyword=reading+comprehension+worksheets+6th+grade+online
    • https://static.usrfiles.com/ugd/33a16d_54244b1ca4fe405f9e850844dd32916d.pdf
    • https://static.usrfiles.com/ugd/9e41f0_f3839c85313e411eb555dab5bd4734e5.pdf
    • https://static.usrfiles.com/ugd/19103d_12290bf4b61a4a2da26a195273c0150b.pdf
    • https://static.usrfiles.com/ugd/9c58c5_8aca2a6b78ba4402bec23360674f22f0.pdf
    • https://static.usrfiles.com/ugd/3254bf_ab25dc1b35844125ae5052bebb378375.pdf
    • https://cdn.shopify.com/s/files/1/0437/6366/3009/files/allen_bradley_contactor_catalog.pdf
    • https://static.usrfiles.com/ugd/6cfc61_d5459723a79f4365bd244d3997685b50.pdf
    • https://static.usrfiles.com/ugd/599f1c_a3f8c5d5269c4b1db195abd4d2f3fb9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_55e7767d0cdd483a97363b0b4daa3e13.pdf
    • https://static.usrfiles.com/ugd/33c377_15a9ee8081ba4545aa5111c259e0a207.pdf
    • https://static.usrfiles.com/ugd/974a4e_6c35e33f65424dd9bb8d29e24b9c53e4.pdf
    • https://static.usrfiles.com/ugd/bb3bf9_f3f61a00558f41968322baebbda4ad96.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_off00006557.bin
2d47ca5946e6b6c035954b0bba4756814a2e88cdda4d25f991e119def917df6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6557 5804 bytes
font_01_sfnt_off0000790d.bin
912237fbe750c17d44d18c777e1ca5eb4aa54d0543420d7735af3760d3fc82b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790D 10368 bytes

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