Malicious PDF — malware analysis report

Static analysis result for SHA-256 08670adcf41a4d15…

MALICIOUS

PDF

66.7 KB Created: 2020-08-31 16:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46ebda976306165781d5087feb14b7ad SHA-1: bc23632c2c47841f027e15ddb08761d39f5d02ad SHA-256: 08670adcf41a4d15bd8318ba5a35827ecd47c151358a1aa2dfda004edfb25765
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=according+to+matthew+sinhala+full+movie, is flagged as a malicious redirector. The document body and embedded links suggest a lure to download a movie, which is a common tactic for distributing malware. The presence of numerous benign-looking Shopify links likely serves to obscure the malicious redirector within a larger link farm.

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=according+to+matthew+sinhala+full+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5709/4551/files/pinebuziselerepafurowonu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/xogojida.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/60616457013.pdf
    • https://static.usrfiles.com/ugd/b8c837_d698581ab6b34881bb95e69b237368cf.pdf
    • https://static.usrfiles.com/ugd/36f25b_9247a88cc23740919bdd16a303933b50.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_a9ad6546e30c4f57ad8be50205d4523a.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/64425851204.pdf
    • https://cdn.shopify.com/s/files/1/0428/6119/9526/files/320204848.pdf
    • https://cdn.shopify.com/s/files/1/0434/0704/8860/files/tideponikedumanoro.pdf
    • https://cdn.shopify.com/s/files/1/0461/7574/8249/files/21198082741.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/david_copperfield_as_an_autobiographical_novel.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/cauchy_integral_formula_proof.pdf
    • https://cdn.shopify.com/s/files/1/0439/7996/4574/files/punogidadixevozamilivanir.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/25734479566.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
    • http://sinhala.sourceforge.net/
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITS
    • http://www.gnu.org/licenses/gpl-2.0.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068bd.bin
f4e061bf152ded56800e30f5fa3e88bb35d4cc6944ff02ce9cdb7692fb0a0a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BD 5576 bytes
font_01_sfnt_off00007b63.bin
55e76964ea0a5e70d4853542e7682782a4d011b9f2c8264f60b18b610fbc2f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B63 38556 bytes
font_02_sfnt_off0000cfd2.bin
56e45cea0de8aa27af3ee0352ba598aa07ecfd1ede54a835795234e864cd4eef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD2 14732 bytes

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