Malicious PDF — malware analysis report

Static analysis result for SHA-256 b330506a0e68ea10…

MALICIOUS

PDF

38.6 KB Created: 2020-08-14 11:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41f353674e1200a17896debd85579a8f SHA-1: 1de6f3b1dbcc25b45b64ee43e5db0fcf8d9cf7f7 SHA-256: b330506a0e68ea10ac675bf3d5f23ec6cd7254570dc015a3d7919d9ee2abd04a
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of outbound links, many pointing to Shopify, likely to manipulate search engine results or distribute further payloads. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic reinforces the social engineering aspect of luring the user to click the malicious link.

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=perimeter+of+shapes+worksheet+ks2
    • http://zadimu.backmunicipalconsulting.com/uploads/1/3/1/4/131409309/mitab-fokowagurelunem-wewodimi-posobodobisaxu.pdf
    • http://files.calvary4you.com/uploads/1/3/0/8/130874433/sipebiruwuxavij_zizozowejokom_xedep_muxiveni.pdf
    • http://files.aqcreations.com/uploads/1/3/1/3/131380842/fexej.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1957/files/5e_gloom_stalker.pdf
    • https://cdn.shopify.com/s/files/1/0439/8769/7822/files/75282245504.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/72282819551.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/workplace_spirituality_and_job_satisfaction.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/john_deere_111_parts.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/35506308790.pdf
    • https://cdn.shopify.com/s/files/1/0432/1021/1491/files/css_absolute_position.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/85554843030.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6071/files/vupekuxiromaxasat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/site_handing_over_report.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_off00005863.bin
4d4d5ee82192e4255a88d0f119c328b9a9f02dbd480f80209d8d2c809815c20a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5863 5400 bytes
font_01_sfnt_off00006aad.bin
0c8d262f4ccb78d7752cd4b8ae3125ecf1a3bcb932c4cb4389969e677ab69dbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAD 10228 bytes