Malicious PDF — malware analysis report

Static analysis result for SHA-256 9385e5894ad16e75…

MALICIOUS

PDF

45.2 KB Created: 2020-08-17 16:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85aacab66231f4a8da1f030e74d5176a SHA-1: 83212fb1e29e5efcee1a353a38e80798485d80d3 SHA-256: 9385e5894ad16e75989fac40ad5da7ab021eb1d43673b279d2cfe4a0757583e0
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, aiming to trick users into visiting a malicious URL. The document body, though heavily obfuscated, contains text related to 'brochure design software free full version' and the malicious URL itself, reinforcing the lure. The presence of numerous external PDF links also suggests a link farm SEO tactic, likely to improve the ranking of the malicious redirector.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=brochure+design+software+free++full+version
    • http://files.theislamicummah.org/uploads/1/3/1/3/131384468/fekeporopubu.pdf
    • http://todis.learningindigitalera.com/uploads/1/3/1/3/131379833/sasobili.pdf
    • http://zibese.arrfanimalrescue.org/uploads/1/3/1/4/131406437/dekejibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3020/files/24449899621.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/capitalismo_socialismo_e_democracia.pdf
    • https://cdn.shopify.com/s/files/1/0438/1458/4477/files/poverty_of_historicism_popper.pdf
    • https://cdn.shopify.com/s/files/1/0435/6636/6869/files/fasurawozasolunovo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/clinical_laboratory_hematology.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/el_yo_biopsicosocial.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/zekobixenasetekedibem.pdf
    • https://cdn.shopify.com/s/files/1/0437/6841/4370/files/travel_risk_management_policy.pdf
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/nfl_playbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/99488856044.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/19622163635.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/best_self_introduction_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7570/files/3d_maker_free.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_off00007260.bin
c756ab748220a06cc40ecd8879eae0bbf7dab7efbfc0ef339a969082fb013c52
pdf-font-stream PDF embedded font (sfnt) at offset 0x7260 5484 bytes
font_01_sfnt_off0000851d.bin
78de837ff98253cca4c20bfef28c41378496b45888ea2f33da586ea77eef53e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x851D 10212 bytes