Malicious PDF — malware analysis report

Static analysis result for SHA-256 6446be2d717be277…

MALICIOUS

PDF

76.6 KB Created: 2020-08-08 16:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba8b51f7ca66c11a26dadad55e087aca SHA-1: 4f4062febe891b0abcbf7f6d1fa0d023e06ab32c SHA-256: 6446be2d717be27742d0831c459ae9869f52ca192461f2adfae068c4fc60d82e
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The primary URL identified, https://ttraff.ru/pify?keyword=analise+morfologica+exercicios+com+respostas+pdf, is flagged as a malicious redirector. The document's content appears to be a lure, disguised as educational material, to entice users to click on these links. No scripts were extracted, but the heuristic firings strongly indicate a link-based redirection attack.

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=analise+morfologica+exercicios+com+respostas+pdf
    • http://files.stuffsarahsays.com/uploads/1/3/0/7/130776393/zunasivov-genumojufebasak.pdf
    • http://files.tinyhomes.10losttribes.com/uploads/1/3/1/6/131607062/weliwozevu.pdf
    • http://files.shannonpoulton.com/uploads/1/3/1/4/131483440/24203.pdf
    • http://files.northyorkmoorstourism.com/uploads/1/3/2/6/132680986/50b8b0092.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/ritezenowuwibawunizuwarol.pdf
    • https://cdn.shopify.com/s/files/1/0434/7101/2006/files/pgyer_movie_box.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/kurujuwekuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevanedinuwisuvajolow.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/bezodapopukunem.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/pixori.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/14021398800.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/junavot.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/zopeligafivutiruwusogusiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/befemalolememimukibe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/kurudukorufekamolafelev.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_off0000e886.bin
a1630c4251b3c65fc8a272edab4a702d919de5bcfbff6e4d36562192a447799a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE886 5532 bytes
font_01_sfnt_off0000fb4a.bin
71551a2121c755a107d80077b8b4b0e4eff17386b563187fe0b2d7aab6613f41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 13400 bytes

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