Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce421ffdf8d36e06…

MALICIOUS

PDF

45.9 KB Created: 2020-07-29 16:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29e94c2ccdc3ffc6e511f4dc41e45a57 SHA-1: db43b60ff0ce4de520ea053e18c318d80bf09dd2 SHA-256: ce421ffdf8d36e06d6724a9b9101f2d480be767729d1f39b943fd65588f02205
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, includes text related to medical techniques, suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware delivery site.

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=tecnicas+de+asepsia+y+antisepsia+en+cirugia+pdf
    • http://files.landlandland.com/uploads/1/3/1/4/131406269/kuloxegegunemosasil.pdf
    • http://files.brooksidepathfinder.com/uploads/1/3/0/9/130969146/sazuxa.pdf
    • http://files.huesoproductions.com/uploads/1/3/1/4/131406684/bapekusupoxi.pdf
    • http://files.truaesthetica.com/uploads/1/3/1/4/131406369/3111343.pdf
    • http://files.huesoproductions.com/uplo
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37741658126.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/jumijonojetagogivaje.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/rodisufozapowisixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/jibiparo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/lufenowarivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0656/6306/files/muvogofemixudakora.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/64430892349.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8104/files/29369059698.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/vovazinesubudapab.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/jorab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.pdf
    • https://cdn.shopify.com/s/files/1/0433/4436/3678/files/gubasexugekak.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/kozubosumos.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_off00007368.bin
4aaeb011960540b87d9d1b2e2828cb367b66cbd93499973fe70d049a38a891bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7368 5112 bytes
font_01_sfnt_off000084de.bin
039083e6464032b77049b19410fdb58522d67391338006e6997172d859ed1367		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DE 10788 bytes

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