Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a61a4b06feec2bf…

MALICIOUS

PDF

30.6 KB Created: 2020-08-19 21:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b21c1358d3e94e9ce1cbb8b1990a68da SHA-1: 619b9724b087874faffe3d906702137f5a717e1c SHA-256: 0a61a4b06feec2bfcde1efb85cf5995506539bda71771807f452e70dd6a8d4b6
174 Risk Score

Malware Insights

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

The PDF document is designed as an image-based lure, presenting a screenshot of a worksheet to entice users to click a link. This link, https://ttraff.cc/pify?keyword=factoring+polynomials+worksheet+khan+academy, redirects to malicious infrastructure, indicating a phishing or redirection attack. The document also contains a large number of external PDF links, likely for SEO manipulation or to obscure the primary malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 30 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=factoring+polynomials+worksheet+khan+academy
    • http://wiwivixar.reneezwang.com/uploads/1/3/0/8/130873894/netutufadew-jopan-fowipuxuboti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/bedavupat.pdf
    • https://cdn.shopify.com/s/files/1/0453/2525/4811/files/ruvasus.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/judenofabesumoxa.pdf
    • https://cdn.shopify.com/s/files/1/0450/0629/1102/files/app_to_convert_to_word_docx.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/john_hopkins_antibiotic_guide_2017.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/jonuvipikole.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3880/files/78832886556.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/78450445960.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/tepemalug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kixekitigatozodevejale.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/29447248271.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/sabejalogexifelisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/nutoripebanip.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/42145464930.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_off000040cf.bin
c7ec668f895e294c54b31e24e2ce81dd9b1878170aed023125aa5b333177fc1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40CF 5700 bytes
font_01_sfnt_off0000541c.bin
852c78d0e9418b34881c8fbc44f02e7552df80bc15d986950f88c4118297d1c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x541C 7436 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.