Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7a76bb72ea7198…

MALICIOUS

PDF

91.0 KB Created: 2020-08-04 23:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1a78dc2462ee80e88977d1b69fe051b SHA-1: 265874f6c0ba03bf7545f9f0875e83b6094fc51e SHA-256: 5d7a76bb72ea7198234312b75e85e7490c8e5ea62969a5f9afde2c166bb416ab
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into believing they are involved in a lottery or prize claim, requiring them to click the link to proceed. The ML classifier also flagged this PDF with high confidence.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=beckett+plays+pdf
    • http://files.reference-press.com/uploads/1/3/1/4/131454151/5603374.pdf
    • http://files.gsuitegurus.com/uploads/1/3/2/6/132695467/febomode_zegefal.pdf
    • http://nawisaf.iammonicaparker.com/uploads/1/3/0/7/130775904/tadomimewogi_rogojuzoselefeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/24731744896.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/6382303133.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0301/files/introduction_to_computer_security_goodrich.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/jaligokasodoloke.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/26973975739.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/sepajuriluberobotuneta.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/advanced_medical_life_support_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/1343087805.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/fazobipunelujujapejojet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8920/files/zapedalu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/d_d_5e_prestige_classes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/zibezon.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_off00011b13.bin
409053a060a25ac46c3b9de61be1507c8dc4da1134caeb942b9bbb4ddeae1ea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B13 5268 bytes
font_01_sfnt_off00012d26.bin
c2365304019b2a9d1456e33230c9ad2abe88ceee953771075e5425d3cd48aa32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D26 16112 bytes

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