Malicious PDF — malware analysis report

Static analysis result for SHA-256 484b0b985358b06b…

MALICIOUS

PDF

32.1 KB Created: 2020-08-08 04:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01190b1394a4ecbbb46886a3b062c459 SHA-1: 8178b5d676b392ef38cdf504a021f34be26376f3 SHA-256: 484b0b985358b06bad9f67996c24d560f9f440527d67d61ecea466b3eef755bb
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious URL, 'https://ttraff.ru/pify?keyword=introduction+to+zoology+pdf+download', is identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting a lure for a PDF download, aligning with the observed link farm behavior. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=introduction+to+zoology+pdf+download
    • http://gulot.quantummentalfitness.com/uploads/1/3/2/3/132303374/vuxoxoruxalonufape.pdf
    • http://roxel.advancedtubularsupport.com/uploads/1/3/1/0/131069934/kenob_vajufu_witefar_bupowamev.pdf
    • http://wotuz.theweddingstationeryboutique.com/uploads/1/3/2/3/132302782/fovesiresuzuxu_zefagosem_jopudofu.pdf
    • http://tezem.onesourcemobilehc.com/uploads/1/3/1/3/131379706/6367212.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2739/files/62299374015.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/45253461377.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/31398192067.pdf
    • https://cdn.shopify.com/s/files/1/0437/8515/8813/files/88099629863.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/20861500167.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/ambiente_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/lowes._com_mylowes.pdf
    • https://cdn.shopify.com/s/files/1/0434/3070/7356/files/lawofinudetetatinan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.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_off000043dc.bin
cfbbaa8afe75d099bb757224d47b9a1f68a797c7abe7480b83bcdade40712df5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43DC 5324 bytes
font_01_sfnt_off00005628.bin
d094bd53e6995ab583bde05efe127d430ae1707329443ce7e1779d10d1460f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5628 8748 bytes

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