Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1a57d125712eaf…

MALICIOUS

PDF

35.1 KB Created: 2020-09-12 18:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15aecf3f72f0c4685ad75d4feff9884b SHA-1: a551bd247499bbf8fa6bbfe29fdbdd3dfd6ddab0 SHA-256: 0c1a57d125712eafc46af68c1af79dc7625c198fe4f9315a40eaa1705424a7d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to "The prologue from the Canterbury Tales" and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious.

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.club/wix?keyword=the+prologue+from+the+canterbury+tales+comprehension+check+answers
    • http://xatatewej.citizensforcivicrenewal.org/uploads/1/3/1/3/131383434/1633988.pdf
    • http://files.besomeoneco.com/uploads/1/3/1/1/131164202/8770530.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/4d6844_aa334aaac24b42deb7a136ebf7f8a290.pdf
    • https://static.usrfiles.com/ugd/18122d_3f5c51c4fa8a4933b3d1806ee510c2ce.pdf
    • https://static.usrfiles.com/ugd/2072cd_231a4437dc514dcf827ecfc213909584.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_79e7febdaa8840b4a25fa96a3fe2729c.pdf
    • https://static.usrfiles.com/ugd/1b8612_a0111bef24204871b638ae36a067c5c7.pdf
    • https://static.usrfiles.com/ugd/9e41f0_7859211817d2403aa303b1eb6f0af55e.pdf
    • https://static.usrfiles.com/ugd/89c6ad_39d5a03b985645fa9d021b6c31dbb677.pdf
    • https://static.usrfiles.com/ugd/2ca22b_b1137c108ae6437b980c31a7ead5a89f.pdf
    • https://static.usrfiles.com/ugd/0251f0_7a2899f2590a4c25b340fdc4ec017e5b.pdf
    • https://cdn.shopify.com/s/files/1/0437/5933/7621/files/jawisoxefozure.pdf
    • https://cdn.shopify.com/s/files/1/0431/3851/5095/files/38451192068.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/80668619793.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9879/files/nhy_n_flash_khi_c_cuc_gi_n_o.pdf
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/43520336276.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_off00004913.bin
dba9f64bd3870d47ddb4efeabc1aeafd303103845bceadcf00f7dda23a4b6752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4913 5776 bytes
font_01_sfnt_off00005cae.bin
b50625a4bf70289297e7a2c60f573054f00f619720e7ac67952489c46e745b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAE 9908 bytes

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