Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cc133c03a669d0…

MALICIOUS

PDF

50.0 KB Created: 2020-08-24 05:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0214171fa6b60a03b02ff3d3cd6ea100 SHA-1: b8756c75fc2119ebb985825cb9dccf123f86ebe9 SHA-256: e5cc133c03a669d01ff3483ac9c2d1bc0be893a9c274da9b158126ff4b6d5d66
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the redirector. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=atomic+absorption+spectrophotometry+lab+report
    • http://files.writing-raven.com/uploads/1/3/0/7/130739782/9270532.pdf
    • http://golujuwus.amandathompsonphoto.com/uploads/1/3/1/3/131379730/puneve-vovuge-bozomokumil-veniwuki.pdf
    • http://files.xoskshop.com/uploads/1/3/1/3/131381539/miseve.pdf
    • http://files.purlieulandscapes.com/uploads/1/3/0/8/130874109/zelisovez.pdf
    • http://files.linsayblondeau.com/uploads/1/3/0/7/130740589/tuluxerivusiti-wixiniv-gowasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/gemidagabulelatefurap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/apa_format_citation_website_in_text.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7570/files/angularjs_4_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/zoruginosemobusip.pdf
    • https://cdn.shopify.com/s/files/1/0431/8484/9045/files/afmc_question_papers_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/weather_report_of_dibrugarh_this_week.pdf
    • https://cdn.shopify.com/s/files/1/0427/5837/3542/files/lipojimovori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/28422413464.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/48393827640.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/the_story_of_an_hour_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8030/9141/files/mibul.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/razikizijakelejilukeditij.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_off0000844d.bin
10587c6e5ac2527f0adf5eb5539368341466b21f23139feb8aefb2d69235a2d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x844D 5404 bytes
font_01_sfnt_off0000967c.bin
1c9782b0b68d54b6167c97377d95221009365235746587d1ac0508d3c0634a0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x967C 10680 bytes