Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1c08f0a31ba5b9…

MALICIOUS

PDF

34.6 KB Created: 2020-08-19 20:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad5e40eb0d3cf0116d0e244025b8f578 SHA-1: 14cb60d5ecf42653232226faf33691b6677a072e SHA-256: 1e1c08f0a31ba5b931571533c9dac51e97023a147d8df96a294a1510025b65e5
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple links pointing to PDF files hosted on various domains, including a known malicious redirector at https://ttraff.cc/pify?keyword=antebellum+reformers+webquest. This suggests a social engineering tactic to direct users to potentially malicious content. The ML classifier also strongly indicated maliciousness.

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=antebellum+reformers+webquest
    • http://files.ccpspasadena.org/uploads/1/3/0/9/130969600/vavuwuzitakas_pizaxas_xiletikeruruti.pdf
    • http://files.kingvan.com.au/uploads/1/3/1/3/131380052/d9ba160.pdf
    • http://files.studiosfinearts.com/uploads/1/3/2/6/132681204/zizaxovojenanamiliz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/24137100163.pdf
    • https://cdn.shopify.com/s/files/1/0438/4414/1218/files/upsc_assistant_commandant_notification.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/milan_classification_of_salivary_gland_tumors.pdf
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/60801979009.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/rebitalafip.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/bituwuruliponugulojubog.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/58209211587.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/lifupalot.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/jewikepakumufanuwamiduv.pdf
    • https://cdn.shopify.com/s/files/1/0445/9390/5828/files/acute_myocardial_infarction_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/tebuwesikedesovibul.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_off0000493c.bin
25870cbc1a6f55867fb0ecdbb805aa80b5cc68ae2a7ff3b3dd416656169a5c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x493C 5052 bytes
font_01_sfnt_off00005a66.bin
f51a78ca60615d98bf595d6f687d173de4fffc7edb8c1923cbb16d0db257d502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A66 9852 bytes

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