Malicious PDF — malware analysis report

Static analysis result for SHA-256 8049372317e8bae4…

MALICIOUS

PDF

50.3 KB Created: 2020-08-02 01:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26289014dfa8dc60f4c6adf982cb3b58 SHA-1: b146f4d3d92a758561915701740cd9072a902697 SHA-256: 8049372317e8bae46c9732b31d6543dbdfa1f39f329b2bb9c72f844be62ff06d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=ulquiorra+x+reader'. This indicates the document's primary purpose is to lure users to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

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/pify?keyword=ulquiorra+x+reader
    • http://files.intentionalmba.com/uploads/1/3/1/0/131069812/7e787ad.pdf
    • http://files.dwolf.eu/uploads/1/3/2/6/132695360/9484510.pdf
    • http://files.minesphotography.com/uploads/1/3/2/3/132303082/fiwalirurobupog-dipelisul-puwofusujo.pdf
    • http://files.marinwoodturning.com/uploads/1/3/1/0/131070982/70a096781c1c15.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5547/files/munigo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8296/3349/files/zewikagisoxivivogemumeti.pdf
    • https://cdn.shopify.com/s/files/1/0432/0424/7715/files/66333145928.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/2857162219.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/vovepumupu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1235/6253/files/buponeduwutijof.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/sagupapivafigefuzulix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34456372212.pdf
    • https://cdn.shopify.com/s/files/1/0437/0871/1080/files/41116750392.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/barabaxexezonigorosijoxar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/rakijomonowumaketa.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007248.bin
7cda3e9fe2d7b4f58bf2b8dc3acca88b645da0848d982e2dc05f7561515a8598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7248 4828 bytes
font_01_sfnt_off000082c4.bin
c1b4da76ed64960cacff84c266d6dcdd485f3ac7b8faab2a69c3b4eb48c0c8bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C4 10156 bytes
font_02_sfnt_off0000a5b2.bin
a8f82ce1cdc57d6cf73caeb35ba0a534b8f114798d4dfc5d6ed82df03316e49d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B2 16384 bytes

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