Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d70b3d22e990128…

MALICIOUS

PDF

51.4 KB Created: 2020-07-30 21:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d22311043faf6783da74a14b7548d5a2 SHA-1: f7c8738d2d68456b352dbd08bb9cf477cc9640f2 SHA-256: 1d70b3d22e99012892bdcb6063d6d8ee5c7a9f351db1441cb77e4c03eb21a123
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one pointing to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=mix+design+ratio+pdf'. The document body, though heavily obfuscated, suggests a lure related to 'mix design ratio pdf'. The presence of numerous external PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy, likely to obscure the ultimate malicious destination.

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=mix+design+ratio+pdf
    • http://files.eifel-wohnmobil.de/uploads/1/3/1/3/131383727/nodolexepazoso.pdf
    • http://files.oneworld-wellness.com/uploads/1/3/0/7/130775558/1897286.pdf
    • http://files.mayanmissions.com/uploads/1/3/0/8/130874610/lurupigezef_mekarok_togatuwuja.pdf
    • http://files.teaching.yfolajimi.com/uploads/1/3/1/8/131856713/ae9332.pdf
    • http://files.arcticfibers.com/uploads/1/3/0/7/130775934/laxiki-lasopiwosot.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/gagisibusuvonozituserab.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/83622713202.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/virefuvegapuzedupitet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77330784460.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/dewolomoxuvewubexolijexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/98323871988.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/25612915846.pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9613/files/87575421606.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/nivigodovulataxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/24088329714.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/37523508078.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/gitadozaxovipoxezirexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/76166124233.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/9235343533.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_off00008aa1.bin
e3118f22b6aa641242f518b34797d99e4a256f45786c7ef364701b46d9bc3dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA1 5040 bytes
font_01_sfnt_off00009bd9.bin
457ac5db7abb66a0ebad66694bad3584bd626e7f9306e0e7d9057b1183a0b84e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD9 10592 bytes

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