Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd969458b4bfbd6…

MALICIOUS

PDF

43.7 KB Created: 2020-08-20 21:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad733c46b1c44accda7deaa0548bd282 SHA-1: 26d6db000a6b3deb2e3b41477ae57faa8c6dff09 SHA-256: 0bd969458b4bfbd6bdf88df088f2b1091570f854aa33f7a434feff5a89f4aedf
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or host malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links and the link farm structure points to a phishing or content-luring attack.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=blackberry+classic+2019+android
    • http://zuvula.panstream.co.uk/uploads/1/3/1/8/131857315/26bd5365.pdf
    • http://files.ilovetheglassonion.com/uploads/1/3/0/7/130739537/a06a7ddd304cc.pdf
    • http://files.thetraumacentre.ca/uploads/1/3/2/7/132712011/6f48ff9c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4870/4917/files/jufarerexipegukata.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7121/files/rooting_verizon_note_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/fasipujagiripimoraxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/dokomaxikef.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6119/files/32807873140.pdf
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/31753107344.pdf
    • https://cdn.shopify.com/s/files/1/0437/5900/9943/files/b._ed_result_2020_kuk_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/28260544994.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/daluxenopifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9742/4026/files/simple_past_form_of_the_verb_arise.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6057/files/wilop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f63.bin
8fe238d4efa118d1e805f072976fe3c461391de55fefcb4facfc8f71fb735506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F63 3016 bytes
font_01_sfnt_off00006a1e.bin
72590aee39cb4733a84792023d16ad42ee5e4c407a62b1a43442fc20e6b8c409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1E 5768 bytes
font_02_sfnt_off00007dd3.bin
2a13353a0e2fcfa8c16685aab47a48bdca1e97188d68f9b7fde4a4f36ee829d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD3 10552 bytes

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