Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae18fe9793d1b052…

MALICIOUS

PDF

49.3 KB Created: 2020-08-02 22:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c925c637265f22517ff34b91de5f8206 SHA-1: 3786cd3e7e0c20602edbc6e89d168bfb02ec496c SHA-256: ae18fe9793d1b052eb1fcc8f81b01eeb8331b9773c641c0d76909bb5c06af4c5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text along with the URL 'https://ttraff.ru/pify?keyword=reload+page+jquery', suggesting an attempt to disguise or obfuscate the malicious intent. The presence of numerous external links, many hosted on Shopify, indicates a potential SEO poisoning or link farm strategy to distribute malicious 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.ru/pify?keyword=reload+page+jquery
    • http://files.coppercocktailco.com/uploads/1/3/1/3/131397930/sumelegenajederadu.pdf
    • http://files.universalwellnessconnections.com/uploads/1/3/1/6/131606630/wozujatokevogu.pdf
    • http://files.westernenglishsetterclub.org/uploads/1/3/1/6/131606261/7034649.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/36506189662.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/22023492636.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/bivasira.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/20090039145.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/13357659072.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/15481949235.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/girl_scout_cookie_order_form_printable.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/xidinibegalarunerikinibex.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0173/files/56264447146.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/ganeguguruwunexetani.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/rijipejoteni.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a67.bin
a1dddfbde6ddc8ad6755645cf939b52348e6802b5bb624fcbfa5c52a31086992
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A67 5260 bytes
font_01_sfnt_off00008c66.bin
ed8cedc4cea2489ef5e03d7a9b1d8fef7b94af01f17af5ae7f5731ea96b1e14c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C66 13888 bytes