Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e21ba94a2272d10…

MALICIOUS

PDF

45.2 KB Created: 2020-08-21 22:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45ce477739bc70b00c8742eb762a850a SHA-1: dea58d1c9d03f4927506f02c1837ae75a92124f2 SHA-256: 0e21ba94a2272d10b3f0e284a30dd24905ecbb3d209e3c191dd5fbf531f02dc2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, suggesting a link farm. One of these links, https://ttraff.ru/pify?keyword=habilidades+informaticas+para+cv, is identified as a malicious redirector. This indicates a likely attempt to lure users to malicious content or phishing sites.

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=habilidades+informaticas+para+cv
    • http://files.baliblessingcards.com/uploads/1/3/1/4/131407096/rufulome_wujatosi.pdf
    • http://files.seattlefirstbaptist.org/uploads/1/3/2/3/132303080/81e42db7c9176.pdf
    • http://zusekef.arnonlevy.org/uploads/1/3/0/8/130874488/gajit_rokewagojifoti_piluvis_wupaji.pdf
    • http://tolimenit.makepaducah.com/uploads/1/3/0/7/130739059/e235f22.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4999/8743/files/11386712965.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/54457834293.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/sidupodevogodutoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/45800943402.pdf
    • https://cdn.shopify.com/s/files/1/0437/1179/1253/files/98630658661.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1913/files/judegixem.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/87229115837.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/sedazozodakawunaduso.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/9781050597.pdf
    • https://cdn.shopify.com/s/files/1/0437/7804/8161/files/febenixixedepa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4199/files/balanopostite_de_repetio.pdf
    • https://cdn.shopify.com/s/files/1/0440/4038/8758/files/69590503492.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/goguzevadabiko.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_off00006f9b.bin
8d6e6172396692020e8fb50d7c2df676b082039f1edda6dda3461a063d88063b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9B 5460 bytes
font_01_sfnt_off00008210.bin
16f8e4be19c4d4a5121a336ea64b77d158d2ddf68402cb3244f977d82773c54f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8210 11132 bytes