Malicious PDF — malware analysis report

Static analysis result for SHA-256 570a8a352664fd7f…

MALICIOUS

PDF

45.6 KB Created: 2020-08-06 07:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 490e62ef035da32d30e8353e0bae8656 SHA-1: 1f17331fdcc44cab623714bed450a89f092ca8ec SHA-256: 570a8a352664fd7fed707bd6f495bff3df8634a840dc89cdc804decd932e4cb0
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains text related to 'psychiatric mental health nursing test questions pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The primary malicious IOC is the 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=psychiatric+mental+health+nursing+test+questions+pdf
    • http://files.spcwaterdistrict.com/uploads/1/3/1/4/131453950/zadejirilofiwaripi.pdf
    • http://files.rebeltoruler.com/uploads/1/3/1/8/131856723/4509346.pdf
    • http://files.pnsw.org/uploads/1/3/1/1/131164568/sovun.pdf
    • http://files.surplususastore.com/uploads/1/3/2/6/132682878/ebf3cd67387ebaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/54366751196.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/turn_list_into_string_python.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/54327836493.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/bssc_inter_level_official_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/cantate_domino_elberdin.pdf
    • https://cdn.shopify.com/s/files/1/0431/3438/6332/files/gaxasalidurukepogiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/pandoc_convert_html_to.pdf
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/webekedafodixumuxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/naworesenobixogida.pdf
    • https://cdn.shopify.com/s/files/1/0439/3736/6174/files/61496088621.pdf
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/xunavarelejeponufaxiwana.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/53846999628.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_off0000721e.bin
26fb6878f637ad9cfff16b86aea87e9a713b626ddb250772c3e73556b2d3ddde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721E 5796 bytes
font_01_sfnt_off000085af.bin
8f5055e0416d59576686a2bfcb5d1c88960d4f236ae360de50c70bbb6f82c555		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AF 10368 bytes

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