Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c70f333a5cb8aa9…

MALICIOUS

PDF

40.5 KB Created: 2020-08-01 07:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b39b0d825408cb5c6f33f65538f0dbe6 SHA-1: 9963882cb5e58a1152ac3c6324322a94a27a0563 SHA-256: 6c70f333a5cb8aa94768f5fb516b5187a1402c17c278ad992969b09896ba02dd
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to drive traffic to potentially harmful content. The document body, though heavily obfuscated, contains references to 'kayla itsines bikini body pdf' and a URL that appears to be part of a link farm, suggesting a lure to disguise malicious activity. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=kayla+itsines+bikini+body+pdf
    • http://files.yifanmake.com/uploads/1/3/0/8/130874125/watepajika_kuzulanat.pdf
    • http://files.threesisterstravel.com/uploads/1/3/1/3/131380058/d198c.pdf
    • http://files.valkariefineart.com/uploads/1/3/0/7/130739664/1819767.pdf
    • http://files.threecreekaussies.com/uploads/1/3/2/7/132710655/sujut.pdf
    • http://files.newleaforganizingllc.com/uploads/1/3/0/8/130874222/4905868.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7828/7521/files/56292918113.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/62824111311.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/dokarabipedipaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/61868803127.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/dukupegerulu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2996/9561/files/97042814170.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/jemerupeteziliwisijinos.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/54790918718.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/raboz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6460/6372/files/89816296980.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_off00006016.bin
461d2b00e31548fd97882791ab831e52786c0ec3f8d36e80d78f915c2433a3c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6016 5212 bytes
font_01_sfnt_off000071ea.bin
259151e1cba0664e190ffbaf732eb3320efd01f57d844f4adf0c8f6cb8ae9132
pdf-font-stream PDF embedded font (sfnt) at offset 0x71EA 10432 bytes