Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1b359d053a93a8…

MALICIOUS

PDF

61.1 KB Created: 2020-08-01 03:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5179162627767abc7569ce59ad12c65b SHA-1: 6ad026abbf281474da50f46651da37414bcfedaa SHA-256: aa1b359d053a93a86ccd2f980951bfd3c0c5d8f00540ace30374624737295a0f
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic identifying a link to a known malicious redirector. The embedded URL in the document body, 'https://ttraff.ru/pify?keyword=absolute+value+in+java', is also flagged as malicious. This suggests the primary function of the PDF is to redirect users to malicious infrastructure.

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=absolute+value+in+java
    • http://files.merakiimeasure.com/uploads/1/3/0/8/130874567/7022705.pdf
    • http://files.sabahhomestaykualapenyu.com/uploads/1/3/1/4/131483265/ximofepo_solejadapuxas.pdf
    • http://files.simplified-networking.com/uploads/1/3/0/8/130813577/bumabelipulat.pdf
    • http://files.davidallisondewitt.com/uploads/1/3/2/7/132740805/jegalotudag.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/54861776004.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/27474574398.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/25831132624.pdf
    • https://cdn.shopify.com/s/files/1/0437/1385/5643/files/80347073991.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/kosimagewidadaxupebeve.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90209356055.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/wuxusowodewadazo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/my_michelle_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/wemapegobidol.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_off0000b332.bin
6a3c82b97305b652099007151a326a983b5bbda34b671049d120ad50f9b57c25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB332 4848 bytes
font_01_sfnt_off0000c3cd.bin
1d5f724f75e9d75780b8eeab1db10b61e665d23fda0556aecb53463310258067		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CD 10460 bytes

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