Malicious PDF — malware analysis report

Static analysis result for SHA-256 013c30853db374b0…

MALICIOUS

PDF

44.2 KB Created: 2020-07-15 13:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0acf3f72fe2043a37ef57587e9c29347 SHA-1: b80f64a8e3fbc4e5bc906e61cf8a4f424ecfec36 SHA-256: 013c30853db374b08b99fce3c5b286413a3728e591905aeba1e8050f9f422ec7
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary function appears to be directing users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9528032-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9528032-0
  • 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.ru/wb?keyword=educating%20rita%20willy%20russell%20pdf%20download
    • http://files.mollyharrisonart.com/uploads/1/3/0/7/130776483/genupuxodive-rotasokemilix-wevaxajelozaxa-dezazeladusop.pdf
    • http://files.spectrumerc.com/uploads/1/3/2/7/132710756/wibinek.pdf
    • http://files.englishiskillingme.com/uploads/1/3/2/6/132695566/cccc21bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/50353255651.pdf
    • https://cdn.shopify.com/s/files/1/0429/9027/2675/files/49169467889.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/29881495279.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/favimawuvuziziw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/lesafunivo.pdf
    • https://noneboge.files.wordpress.com/2020/07/10611916122.pdf
    • https://xonoreja.files.wordpress.com/2020/07/11592174282.pdf
    • https://lonefib.files.wordpress.com/2020/07/74947749506.pdf
    • https://mowugowewuv.files.wordpress.com/2020/06/41096105931.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/jukaziruk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/webojitomuxeboxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/sedabewatowutuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/velokiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/zedudiziduxadagaboxi.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_off00006c45.bin
c6469fe432fdd91dacff93c0d1963ed7ce88f941425fed59762ffad035962adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 5356 bytes
font_01_sfnt_off00007e9f.bin
059d3a2c227a6e0d0106bdc1f7b35b22b0c5db2f9fea76e7bb13a36e98d079f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9F 10092 bytes

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