Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c68d282a4f1a15…

MALICIOUS

PDF

44.4 KB Created: 2020-08-10 00:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7009eb0ded28956a0d697c4dbc94c490 SHA-1: ebba60141578f4d7a8b8fe8ccf1292868d3b2772 SHA-256: 23c68d282a4f1a15f7b581916c83adfc0ba67b4dea69fb5ee7cdebd7615f18b5
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'accounting ledger paper pdf' and includes the malicious URL. This suggests a lure to trick users into clicking the link, likely leading to a phishing or malware download site.

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=accounting+ledger+paper+pdf
    • http://files.carzlyfe.com/uploads/1/3/1/4/131483584/reredupoba.pdf
    • http://files.enlightenmetoday.org/uploads/1/3/0/7/130776058/mipadurabu.pdf
    • http://files.revdrrebeccammvoelkel.com/uploads/1/3/0/7/130739697/bf48bc94c4d8ed.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/64283306665.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/37568977458.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/zelaxusafomijoloxugesa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/rafidekadegimiloka.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5772/files/58516221716.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/construction_worker_resume.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/juzifemuju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/xebizepebakar.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8954/files/cancer_de_lengua_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9561/files/tarkov_key_bindings.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/zulifibatidejegukan.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/xumodezewowotanidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/42913082451.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fodafozisejuleluz.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_off000071bf.bin
665b079116e7f817c1fb161300d519272a1c93f833a4db17fa5c5d65d7df9da7
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BF 5136 bytes
font_01_sfnt_off0000834a.bin
bb2984ae439c455c9f2ab4cb25201c51f7d3dbe7e4a8e08da22ae93b32ed1210
pdf-font-stream PDF embedded font (sfnt) at offset 0x834A 9604 bytes