Malicious PDF — malware analysis report

Static analysis result for SHA-256 59553f5396fb2297…

MALICIOUS

PDF

40.4 KB Created: 2020-08-14 11:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae1207042cde2748263b8733b6643531 SHA-1: b5eac0162efe2f1ec0a8dbd952b34dc2b8dde440 SHA-256: 59553f5396fb2297f69904d3ce0523882a1dd94a3accd7514e98aa9fb31b349c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, ttraff.com, is used in conjunction with a keyword related to a common Excel issue, suggesting a phishing lure. The document also hosts a large number of links pointing to Shopify-hosted PDFs, likely part of a link farm to improve SEO for malicious content.

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.com/wb?keyword=excel%20worksheet%20scroll%20bars%20missing
    • http://jowofodul.northchesterbaptist.com/uploads/1/3/0/9/130969204/gagetopowimano-titawo-ligul-rikudeselofe.pdf
    • http://nefesuzu.shop-brokenlimits.com/uploads/1/3/0/8/130874493/cb089443d.pdf
    • http://lemudor.dchatt.com/uploads/1/3/0/9/130969808/7671496.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/nivefimubupalojonuzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/english_speaking_sentences_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/24061763703.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/95750221860.pdf
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/2300857301.pdf
    • https://cdn.shopify.com/s/files/1/0435/3507/3448/files/applied_microsoft_sql_server_2020_analysis_services_tabular_modeling.pdf
    • https://cdn.shopify.com/s/files/1/0430/5285/9543/files/antisosyal_kiilik_bozukluu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4237/3785/files/java_tutorial_guru99.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/lanibeberipuboxomufek.pdf
    • https://cdn.shopify.com/s/files/1/0431/7865/5903/files/jigolo_har_megiddo_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0438/4355/1392/files/42218655081.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21511039237.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_off00005f0c.bin
8a19c2338fffc05b0235894250414196e007e0a1271dfd49fc8fd0e7e9e64255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0C 5536 bytes
font_01_sfnt_off000071ce.bin
88144b25a35d22522cc4bc15cf95d7d379c52f2f00b078964ca50b1c20564ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CE 10604 bytes

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