Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d83664eaaf3ead…

MALICIOUS

PDF

60.5 KB Created: 2020-08-13 03:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57baf2f743ec14bf292f3e9b3f232c26 SHA-1: 9c681cd653df4d6ccf531a0211dbc40df091a3c5 SHA-256: e7d83664eaaf3ead658f00f933ceec46d53bd74d27ac8d4d9e6167e207311819
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a social engineering attempt. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wb?keyword=general%20veterinary%20parasitology%20pdf, which is also flagged as malicious. The presence of numerous external links, including one to a Shopify domain, suggests an attempt to drive traffic 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.cc/wb?keyword=general%20veterinary%20parasitology%20pdf
    • http://files.beritgehrke.com/uploads/1/3/0/7/130775393/a2f309.pdf
    • http://files.recrates.co/uploads/1/3/1/8/131857315/3163430.pdf
    • http://files.chrispickettceramics.com/uploads/1/3/1/6/131637081/fozukupoku_malido_fupemerux.pdf
    • http://puvokika.missinglinkbrewery.com/uploads/1/3/0/7/130775627/9320005.pdf
    • https://cdn.shopify.com/s/files/1/0451/3693/7125/files/excell_pressure_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/asthma_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/47494622888.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/setofesoxivefap.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/promissory_note_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/fuseperewexuzevetekid.pdf
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/bhrashtachar_essay_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/when_we_dead_awaken_adrienne_rich.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3152232763.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8139/files/60762839397.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/88499060286.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/install_scikit_learn.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_off0000af96.bin
6cc9e4502c1d2a5c694efa9f963bbe950e3a077422436babfa834d28423105ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF96 5404 bytes
font_01_sfnt_off0000c217.bin
fbe9fced7fe18b28e7fa2559c3f1a5498b628211e90adf222d21b24cb7b9088a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC217 10068 bytes

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