Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7ab2beb3194ca6…

MALICIOUS

PDF

43.0 KB Created: 2020-08-04 02:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 535b088caa937340651d72c411ff3bc4 SHA-1: d112d41777fa200f17f3927da5532b30d1c68efa SHA-256: 9a7ab2beb3194ca64fa4f8e9a58c9a4297863c019a28e066064376afd6d30ff7
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL designed to lure users with a search query. The document body, though heavily obfuscated, contains text related to 'knee strengthening exercises pdf nhs' and the malicious URL itself, suggesting a phishing or scam attempt. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or distributing malicious content.

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.cc/pify?keyword=knee+strengthening+exercises+pdf+nhs
    • http://files.sobadagility.org/uploads/1/3/0/7/130775607/puganafoj.pdf
    • http://files.idealcitydesigngroup.com/uploads/1/3/0/8/130873826/4f42e56363e.pdf
    • http://files.otticacastelli.com/uploads/1/3/1/3/131383619/dikul.pdf
    • http://files.bleuprinthairstudio.com/uploads/1/3/2/6/132680986/vomimabizosaxaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/85987010542.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/12908742445.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pagujusevidunevaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/tatuduwapokaxakife.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/wofofigorizepomurugewod.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3166/files/sigovexumefojumexed.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/33549120452.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/puwusenixenefuvosa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/45651610132.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/vakekodogusivavotonedati.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/mivazusazasajupu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/pusizudajegu.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_off00006bd8.bin
eb19e87ad38f847a0a918f3a71ce294673d779a70ccee58cc8b5185350625cef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD8 5212 bytes
font_01_sfnt_off00007da0.bin
5f954bcf1344c2005f566a019540f1b5c50c6f138a56f0d238d471a459a822c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA0 9944 bytes

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