Malicious PDF — malware analysis report

Static analysis result for SHA-256 856f1682e805f26b…

MALICIOUS

PDF

66.4 KB Created: 2020-08-24 19:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d94f404b9e1fe346d4517a2f857a145c SHA-1: bf602d12b7e26610402ab49c93e0b284303bb212 SHA-256: 856f1682e805f26b1074a8dabbeb7eb388e9af2cc9bf67d49fb644a9471db75d
128 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for an annual report, aligning with the SE_INVOICE_LURE heuristic. The PDF_SEO_LINK_FARM heuristic suggests the PDF is part of a link farm, likely to distribute malicious content. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=panacea+biotec+annual+report+2019
    • http://files.kiarakzelcreations.com/uploads/1/3/1/6/131606362/ee2811d.pdf
    • http://zemeparuv.omahabeadaffair.com/uploads/1/3/1/8/131871726/vonizuxoremevupuni.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/xevubidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6975/1967/files/ampex_350_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/8092/2789/files/bholanath_song_2019.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/movikobufasofiwokafinod.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7599/files/sefegiwikemitijanudina.pdf
    • https://cdn.shopify.com/s/files/1/0437/1624/7703/files/togejaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/68954907131.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/rejovan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0435/6096/0159/files/favugozetiwosizuronefixa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3714/5753/files/19619282389.pdf
    • https://cdn.shopify.com/s/files/1/0465/1584/7318/files/adverse_opinion_audit_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/buxujigadenepegawule.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_off0000c662.bin
9ba0128688cc998674874cb30d798f528706db2400e46ebb5644ea151bb0c534
pdf-font-stream PDF embedded font (sfnt) at offset 0xC662 5372 bytes
font_01_sfnt_off0000d8ac.bin
526771b7f3469144bbec185592c5aaed8d2e672dd82d5c699a02ffdd6ad5de68
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AC 10456 bytes