Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7de23c3ee6cca8…

MALICIOUS

PDF

67.6 KB Created: 2020-08-06 21:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d8778eef9988dcfd2415c4664de0990 SHA-1: 3cc9057834104ff5363e6cbc0148f50801d3deb7 SHA-256: be7de23c3ee6cca8e7ae1c22550957abde9a4ab262216badf0afab69f938131e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to the presence of a critical heuristic firing indicating a link to known malicious redirector infrastructure. Additionally, another critical heuristic detected a mass external PDF link farm, suggesting a potential SEO manipulation or phishing attempt. The document body contains obfuscated text and multiple URLs, including the primary malicious redirector and several benign Shopify links, along with other unknown URLs hosted on custom domains. No scripts were extracted from this sample.

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.com/pify?keyword=punyanagari+epaper+dhule+pdf
    • http://files.beautifulchildrensrhymes.com/uploads/1/3/0/7/130739081/noforadomuxa.pdf
    • http://files.snowstorm-artstudio.com/uploads/1/3/1/0/131069950/4209074.pdf
    • http://files.sweetearthjewelry.com/uploads/1/3/1/3/131380263/libetaxiloxef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/discord_text_markup.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/dd_form_2977.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/jusitalakatonelijuzegeboz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/defesater.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/22822459568.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/velokiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/66898536520.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/goojara_ch_watch_series.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/75951943502.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/12138900437.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/vatanobififok.pdf
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/wafip.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6207/files/gukiwuberemefufizos.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_off0000cd17.bin
96ebe2f69baa4194e4af870820b4f39923d2b12950ef30397457e07e34bd4763		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD17 5228 bytes
font_01_sfnt_off0000dee5.bin
ab743df2724260db857effac35317debe729c6281a1f7f4815e9f2e497aba0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE5 9960 bytes

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