Malicious PDF — malware analysis report

Static analysis result for SHA-256 6828d79190520e56…

MALICIOUS

PDF

48.0 KB Created: 2020-08-06 22:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47a9c9029eefd928fc23a9bcc85059b5 SHA-1: 713d7332fc393b79d20083d8c5a512f2f50f7c13 SHA-256: 6828d79190520e56bf6d3e94019b1c536ea6963eb8f2ad262139878ed56612f8
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=metodo+anticonceptivo+diu+pdf', suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious redirector links.

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=metodo+anticonceptivo+diu+pdf
    • http://files.thurlingguitars.com/uploads/1/3/0/8/130874063/3514529.pdf
    • http://files.koosdesign.com/uploads/1/3/1/4/131437567/df0ad6e047fd1.pdf
    • http://files.expandedhealing.com/uploads/1/3/0/7/130775762/mifiborerog.pdf
    • http://files.climatechheatingcooling.com/uploads/1/3/1/3/131398423/c3fec48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/raised_eyebrow_meme.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50306279194.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/64754069162.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/4442099629.pdf
    • https://cdn.shopify.com/s/files/1/0432/9281/9616/files/xisuvitiguxenajekafot.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/75466147816.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/gubudezidufevozerob.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/repibijamidoreb.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/62216706692.pdf
    • https://cdn.shopify.com/s/files/1/0428/6667/1782/files/goxedivirimuvoxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/61979760039.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80084587067.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/70186371580.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_off00007f4a.bin
e87131fdfffbb3e973c8f4f1d12c1aa5e5bf3c0354bf0ae23ab0a6ccaee12211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4A 4908 bytes
font_01_sfnt_off00009030.bin
bc629701540b19c9623040134e9f52913606d377b7b1fef2df201d5b692946d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9030 10304 bytes

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