Malicious PDF — malware analysis report

Static analysis result for SHA-256 d277faf263aecb68…

MALICIOUS

PDF

45.4 KB Created: 2020-07-31 05:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80c29887d0a4b9db5661b4cb081b3c8d SHA-1: ff15130bbc1d9b6315f87be868d1f627879e70b0 SHA-256: d277faf263aecb680a888a851df88670e47b85826064ffc0d3cc3548a45c8192
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as interview questions. The document also contains a mass external PDF link farm, indicating a likely attempt to manipulate search engine results or distribute further malicious content. The primary IOC is the malicious redirector URL.

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/pify?keyword=interview+questions+for+job+pdf
    • http://files.thelivbits.com/uploads/1/3/1/4/131455463/4624817.pdf
    • http://files.spanishfluencyacademyforyoungsters.com/uploads/1/3/1/3/131380420/dogivaka-patop.pdf
    • http://files.valgbbo.com/uploads/1/3/0/8/130813094/2570967.pdf
    • http://files.key2evolve.com/uploads/1/3/0/8/130874318/zasabuxemer_xawapikiguromik_balasoge.pdf
    • http://files.spanishfluencyacademyforyoungsters.com/uploads/1/3/1/3/131380420/d
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/41547289733.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/68981293263.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/wagano.pdf
    • https://cdn.shopify.com/s/files/1/0430/3355/9203/files/rokaxevajusugupodiwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/pufudapakekidumus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/wojijejo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/72255589034.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/feruvonigaginobox.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/kirelejarorifi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/womubarivirinawudivemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/navelozomiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/91428115041.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/biteworagalutasuxaja.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_off000073d7.bin
b58871307d549dfc3daceeb824ae78d8e60c37bf5634951b6d582453874d947b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 5104 bytes
font_01_sfnt_off0000854a.bin
ac818df3a30cd45f24bc8943f0702777ab9a2b39d26d1d07d5e84e5356f14316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x854A 10712 bytes

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