Malicious PDF — malware analysis report

Static analysis result for SHA-256 a921c6c2546cb53f…

MALICIOUS

PDF

53.2 KB Created: 2020-08-22 14:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 711599abf2c5a23304db39dba988653f SHA-1: c72f53947fb391c33fd220ee58c86d02021ee932 SHA-256: a921c6c2546cb53fc65b5de7951eb9a5b575002656dba7d9b7c5d7e77009aa1f
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic identifying a malicious redirector. The document body, though obfuscated, contains text related to a worksheet and a URL that matches the malicious redirector. This suggests the PDF is designed to trick users into clicking the link, likely leading to a malicious download or phishing page.

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.cc/pify?keyword=physio+epithelial+tissues+review+worksheet+answers
    • http://vinevo.pregnancycentergadsdencounty.org/uploads/1/3/1/6/131637457/jusuborelulegupene.pdf
    • http://dolonobin.d-dcrafts.com/uploads/1/3/1/3/131383483/rawopuxajop.pdf
    • http://files.capitalcitycrew.org/uploads/1/3/1/8/131856706/7822172.pdf
    • http://files.forbesbeauty.ca/uploads/1/3/1/3/131398093/2858157.pdf
    • https://cdn.shopify.com/s/files/1/0437/4485/4165/files/59430054776.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/53825369751.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/valotuxagolawupemo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/56240559725.pdf
    • https://cdn.shopify.com/s/files/1/0430/7694/4033/files/zagamofijepifudiribaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7138/files/plague_inc_ios_free_no_jailbreak.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/the_avengers_logo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/zodigegesovibizud.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/kumudoji.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/sofevekipuxoda.pdf
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/rudram_namakam_chamakam_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/pipakemaguse.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_off0000858d.bin
5fb41218eb46aae07dbc15ca6858a292efe43cb9e864f4a5159d45bba8b78b97
pdf-font-stream PDF embedded font (sfnt) at offset 0x858D 5108 bytes
font_01_sfnt_off000096f3.bin
d82d26581f65f6bbc8615b4311b8c7465a451619395c4938d3aeab245591c309
pdf-font-stream PDF embedded font (sfnt) at offset 0x96F3 10028 bytes
font_02_sfnt_off0000b92c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB92C 4324 bytes