Malicious PDF — malware analysis report

Static analysis result for SHA-256 11465c032678fba0…

MALICIOUS

PDF

41.0 KB Created: 2020-08-13 18:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2777bcdceb200a3e96dc933c395c6bd8 SHA-1: 33f7143d4a27165963a6cd08e7de5f5427f4281a SHA-256: 11465c032678fba0c83ac1e74a641c7d6eb5052cd36d31639c754d6afedfb3ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the text "joint manipulation techniques pdf" and the malicious redirector URL, suggesting a lure to a malicious site. The presence of numerous external links, including a malicious redirector, indicates an attempt to drive traffic to potentially harmful content.

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/wb?keyword=joint%20manipulation%20techniques%20pdf
    • http://files.christophertsmith.com/uploads/1/3/2/6/132682471/lotudise.pdf
    • http://files.allegrezzasingers.com/uploads/1/3/1/6/131606486/digipirogupavo-xuwod-rajiradetoreduj-jufafubogikeli.pdf
    • http://files.bustedglamour.com/uploads/1/3/0/7/130775554/498429.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/9909/1098/files/zozasajitukudiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/wbbse_class_10_math_solution_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/torulaxozixodatubukuwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bizisumexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8043/4342/files/33763483671.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4673/files/days_of_the_week_english_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/3579/5354/files/59861069010.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0165/files/93903990265.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/powawofamafomonitidaguzig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/1331399350.pdf
    • https://cdn.shopify.com/s/files/1/0435/2534/1343/files/logical_thinking_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3004/files/korean_beginner_test.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_off00006104.bin
6d8c51f90c08a744b74405da38c1a990dff24b175b38947f229f93b59eeb982b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 5416 bytes
font_01_sfnt_off0000733f.bin
c6d2dd50237cb43d6d06a8f9725783b82bd26248c9f940b45c6155d2a19a6a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733F 10492 bytes

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