Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e41bfc953bb6ed7…

MALICIOUS

PDF

41.3 KB Created: 2020-08-28 20:39:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94ec1e263968823e585492dbe7a428dc SHA-1: a345adc0a2411650ec14dc5f19ae48da2c423cdb SHA-256: 5e41bfc953bb6ed774e0b6c83da33f1634de064e106d991e92779bda1590ad1b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise its malicious purpose. The primary function appears to be directing users to potentially harmful external sites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=via+espolon+adamello+riglos+2005
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/lamopuxoniralufuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6757/files/cambridge_ielts_8_reading_test_5_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/66657550879.pdf
    • https://cdn.shopify.com/s/files/1/0438/8500/2920/files/80643444637.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdf
    • https://cdn.shopify.com/s/files/1/0435/1141/4939/files/78341336658.pdf
    • https://cdn.shopify.com/s/files/1/0436/2695/4905/files/schwing_stetter_cp_30_batching_plant.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/34956907049.pdf
    • https://cdn.shopify.com/s/files/1/0463/1619/1904/files/kurizerojerawu.pdf
    • https://static.usrfiles.com/ugd/b8c837_a97c488d32be40fe8217e8406d7f95f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3902005ac65449fa4739ab3008de5bf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8676/5475/files/66045985926.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/tetap.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/46800367110.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006389.bin
c257cb4c246885a7e03509428fa2732354b6c7b02055e2465e5e789a06bc2673
pdf-font-stream PDF embedded font (sfnt) at offset 0x6389 5640 bytes
font_01_sfnt_off000076a1.bin
e453b8b083d281dc8ad68657573b52b2f56eb9f23ed0808f7202c1834e794ca3
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A1 9860 bytes