Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f77d7efc68adcb…

MALICIOUS

PDF

35.4 KB Created: 2020-08-29 21:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a5337c5dbd369ccd0d3bc6b90df3c1c SHA-1: 83ec489a8d7d0f9761a71b982b0267efed1ada42 SHA-256: 08f77d7efc68adcbbd74e9c1798c7c1c0eea679ceec10fa3169d97880cf95a74
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'ordinary days sheet music'. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly indicates a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further compromise.

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.cc/wix?keyword=ordinary+days+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0278/1083/files/jepokubodujitur.pdf
    • https://cdn.shopify.com/s/files/1/0447/7868/4573/files/graphing_linear_equations_worksheet_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7461/files/things_fall_apart_book_report.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_0c709968c371463e9585e9c806cb346a.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb8f0d6663694b40a20dccc2731d356b.pdf
    • https://static.usrfiles.com/ugd/c5d40f_d5b40159614642bda52140b1e40f8946.pdf
    • https://static.usrfiles.com/ugd/b8c837_babffb207e8143ed8cd33ab84d595b2a.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/kirovitugir.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/xuledamilezajifajenulowaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7723/8945/files/being_in_balance_wayne_dyer.pdf
    • https://cdn.shopify.com/s/files/1/0439/2937/0779/files/adizes_corporate_lifecycle.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_eb9179dff3544d7b8b0467043f7960c7.pdf
    • https://static.usrfiles.com/ugd/cf14a4_90a0280000324653888cdd9f796b769d.pdf
    • https://static.usrfiles.com/ugd/b8c837_07bc7cd46fb1408eab3625b5947bd6ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b12ea54676b4fd69226921cd694a7aa.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_off00004d90.bin
f82cf95fdd201d26a3c51c12f93c4ce586d682f33aa6b3e12faf36e5ac2bf7b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D90 5276 bytes
font_01_sfnt_off00005f55.bin
7c86b6f92d947310b396390606272de38954d084a935da91a8f6276ece079fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F55 9828 bytes

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