Malicious PDF — malware analysis report

Static analysis result for SHA-256 8858fb2ba9fd847a…

MALICIOUS

PDF

86.9 KB Created: 2020-08-15 15:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 765a90c641c553758fe3958003143e01 SHA-1: d6bb8a85090230e52acd99bd45e76d27909cf9a2 SHA-256: 8858fb2ba9fd847a8fd39632c6a1d92f1a70fd2e655b8986ac71480718a46c85
168 Risk Score

Malware Insights

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

The PDF contains lures for an advance-fee scam and urgency, directing users to click links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wb?keyword=pathophysiology%20of%20protein%20energy%20malnutrition%20pdf', which is the primary IOC. The PDF also contains a link farm, with several other unknown URLs pointing to PDF files.

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wb?keyword=pathophysiology%20of%20protein%20energy%20malnutrition%20pdf
    • http://files.globalisationandcities.com/uploads/1/3/1/6/131607174/jilaxafufusekiw.pdf
    • http://nidujor.buildwa.org/uploads/1/3/1/6/131606349/gemuji_jisegawarefapet.pdf
    • http://files.erauacafellas.org/uploads/1/3/1/4/131409309/6972752.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/66728399050.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/53131620136.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/vegan_carb_cycling_meal_plan.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/free_church_bulletin_templates.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1278/files/vuvidivelamis.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/xasewolimomenuziso.pdf
    • https://cdn.shopify.com/s/files/1/0432/7397/8011/files/nifasopubemipepul.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/wagubijurulixuk.pdf
    • https://cdn.shopify.com/s/files/1/0450/0904/3606/files/command_line_arguments_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0440/5903/3752/files/bepikegagaxov.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/broiler_chicken_production_business_plan.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_off0000f49b.bin
7f594a98de348997a79d67420a6c0a39e6c3caf2ac1983973f321e26aeea9133		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 5556 bytes
font_01_sfnt_off0001075b.bin
d4da27e71ca91f3016c420200f07392a5f161156168df6c405746525f3b0d00a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 15968 bytes
font_02_sfnt_off000138c3.bin
8d0ca5441952925faa6f68d28470995fcd5e3edd800b1977fac83179433ae1db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138C3 16136 bytes

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