Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b2a942261b1290…

MALICIOUS

PDF

41.5 KB Created: 2020-09-03 03:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44c970d0b30f69bfcf0f57073f9a926a SHA-1: ccb515d7be39ef197b80834af32de837fada7f71 SHA-256: a8b2a942261b1290d0f89f7e2b03f8c07284102dd782c2d6af782b82771309e2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristic. This URL is likely intended to redirect the user to a malicious site, possibly for phishing or malware delivery. No scripts were extracted, and the primary malicious activity appears to be the redirection link.

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.club/wix?keyword=describing+people%2527+s+appearance+in+spanish+worksheets
    • https://static.usrfiles.com/ugd/99afdc_8d7eff986ac94ceb900eaeee7428aab0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8c3f96b8e13470b834a4425a36cae95.pdf
    • https://static.usrfiles.com/ugd/36f25b_3c16f57ec3c94c298deb76fd0633ddea.pdf
    • https://cdn.shopify.com/s/files/1/0429/2293/4435/files/50300332698.pdf
    • https://cdn.shopify.com/s/files/1/0450/2516/5476/files/krishna_objective_zoology_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1917/3029/files/acupressure_for_height_growth.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/yugioh_gba_games.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/kofej.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3493/files/aluminium_chloride_msds.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/76623524001.pdf
    • https://cdn.shopify.com/s/files/1/0437/7536/1178/files/tedolitifakewupozozafap.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/suwenazunodudavowuzof.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/dedurugakekurosamedikik.pdf
    • https://cdn.shopify.com/s/files/1/0433/4783/7083/files/habitat_worksheet_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/kewokirugegajiviro.pdf
    • https://cdn.shopify.com/s/files/1/0459/6996/5216/files/alabama_state_income_tax_form_40nr.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005723.bin
07a120059737a5ea9bc65bbbfc9dcaa5833159d321337e19f4ccbb9b8d91932c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5723 5312 bytes
font_01_sfnt_off00006934.bin
ba946172f8b838a62c800ed5a00588dcff4e2364d976cc783688d640b878b15b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 9672 bytes
font_02_sfnt_off00008a58.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A58 4324 bytes