Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e1b12cd8030416…

MALICIOUS

PDF

43.9 KB Created: 2020-08-14 16:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cfeb87a3afbdfe2e771793530112521 SHA-1: dc856b357e1e41ef5a684aa24b00b7c4b2283506 SHA-256: 32e1b12cd8030416f545df668aa688ebc2e2c577f690f0737bd07b2e3ceee29f
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.ru/wb?keyword=thyroid%20function%20tests%20pdf'. Another heuristic indicates a link farm, suggesting the document is designed to drive traffic to external sites. The presence of multiple PDF links, many hosted on Shopify, further supports the idea of a link-based lure. No scripts were extracted from this sample.

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.ru/wb?keyword=thyroid%20function%20tests%20pdf
    • http://files.eagleyoungmarines.org/uploads/1/3/0/8/130874266/4050232.pdf
    • http://pedefamez.jojasperdean.com/uploads/1/3/1/4/131409546/kitazu_munevidedatuxo_sokuviterara.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/comparative_superlative_exercises_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/texirid.pdf
    • https://cdn.shopify.com/s/files/1/0433/6694/0828/files/canara_bank_corporate_net_banking_form.pdf
    • https://cdn.shopify.com/s/files/1/0436/7394/4217/files/73006985979.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/rajifo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/drugs_in_anaesthesia_and_intensive_care.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/gay_sex_position_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/macho_camacho_s_beat.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/business_sales_letter_sample.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_off00006f7e.bin
fb0013ad4f64e389340756d75cbbec1c22571559deb2fc5ac62096c2dacd9809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7E 5052 bytes
font_01_sfnt_off000080b0.bin
dd169df3fec4b2c227f518f15e5a1852287f19635ff44c952c1574d524c9df9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B0 10120 bytes

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