Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b003cb9c0edb00…

MALICIOUS

PDF

46.8 KB Created: 2020-07-23 03:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2005e766adbc02edba042d1aa583c69b SHA-1: 0c037b323f74b91dc64760997e1c1de733c0d49f SHA-256: 01b003cb9c0edb00463266236561cb8da7c169b3d870048a4bd0c4e9a56c76fd
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating it acts as a redirector to malicious infrastructure. The primary malicious URL identified is 'https://ttraff.com/wb?keyword=familia%20tinamidae%20pdf'. The document body is heavily obfuscated, but the presence of numerous links and the redirector heuristic strongly suggest a phishing or malware delivery attempt.

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/wb?keyword=familia%20tinamidae%20pdf
    • http://files.ishan-yu.com/uploads/1/3/1/4/131408546/3922209.pdf
    • http://files.gwdayschool.com/uploads/1/3/0/7/130739616/1e234.pdf
    • http://files.wilddragonflyshop.com/uploads/1/3/1/4/131437702/mowamoji.pdf
    • http://files.newmoses.com/uploads/1/3/1/0/131070485/a442c9584b52.pdf
    • http://files.mygreenage.com/uploads/1/3/0/8/130814355/916560e4151353.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4741/8016/files/tiferati.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5805/files/tikesixaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0436/5330/0377/files/kefobufenunekerativogub.pdf
    • https://xafozasad.files.wordpress.com/2020/07/vomase.pdf
    • https://giwegepolefo.files.wordpress.com/2020/07/14563569884.pdf
    • https://gebakakokexo.files.wordpress.com/2020/07/41236659895.pdf
    • https://nanesezup.files.wordpress.com/2020/06/fivodupirugeziduxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/kanas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/27328152235.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/texojonidi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/luzamoxalikiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/wunonapusele.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_off00007596.bin
9b0b552e0b4632e83e2c202c2d5e118e9f8a549369ebebf4cc6635137805f0aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7596 4544 bytes
font_01_sfnt_off000084e5.bin
2bbf03f757c3077d808c22b6db58227fc266f06c8b8b0fb49f9cf4c9a72efaf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E5 14832 bytes

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