Malicious PDF — malware analysis report

Static analysis result for SHA-256 51afdf4e66a48dc8…

MALICIOUS

PDF

42.0 KB Created: 2020-08-11 14:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e603088e9e30ae47ac61d4737d26b227 SHA-1: d8999cd15b5ba8dd3d4b2b69daff31f13026296f SHA-256: 51afdf4e66a48dc8f6ace17f31c4eb5d949ce3fbbf5862d56b533e8e954ea2a0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'frontline magazine pdf upsc' and includes the malicious URL. This indicates the document's purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=frontline+magazine+pdf+upsc
    • http://files.pinkturtledesigns.co.uk/uploads/1/3/0/7/130775747/ba76087889d42.pdf
    • http://files.ponyexpressgamez.com/uploads/1/3/0/8/130874377/1390004.pdf
    • http://files.adventmoravianbethlehem.org/uploads/1/3/1/4/131406945/08a9ff8.pdf
    • http://sekerisu.thestore99613.com/uploads/1/3/1/4/131453540/jorejalowanem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/25235995631.pdf
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/82808927912.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/lebifululomiza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/java_https_post.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/osteoporosis_treatment_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/68499507328.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/just_mercy_bryan_stevenson_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/dovarexazobadisevetatigej.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/vefaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/oscar_peterson_hallelujah_time.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_off00006673.bin
a1f8288f852b6cd5fdf9ceb24c71036dd0c5fc8ea500ba469200dc606f73d309
pdf-font-stream PDF embedded font (sfnt) at offset 0x6673 5480 bytes
font_01_sfnt_off0000790a.bin
2bed287e2ae80176af82e4a244008810547e2534cb3ac0dfe1c23997c5f3156a
pdf-font-stream PDF embedded font (sfnt) at offset 0x790A 10012 bytes