Malicious PDF — malware analysis report

Static analysis result for SHA-256 1074ace06215b53d…

MALICIOUS

PDF

53.5 KB Created: 2020-08-24 14:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffbf61ad9c59cae7391f4a73b364e67f SHA-1: 82ef2f54bc5f6b46d6fe7cdab12de1e9d5738b3d SHA-256: 1074ace06215b53df3f5be96fe597e7811ada005a8cff48e770ca20cd2cef5db
154 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Android studio shortcut keys' which directs users to a malicious redirector URL. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and embedded malicious redirector indicate a phishing or redirection attempt.

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.com/pify?keyword=android+studio+shortcut+keys
    • http://files.cestagift.com/uploads/1/3/1/1/131163601/tezuxijolamokub_bozolugadajaso.pdf
    • http://deperevo.heugafoundation.org/uploads/1/3/0/8/130874493/1452820.pdf
    • http://kusanam.slipstreamnewmusic.com/uploads/1/3/0/9/130968961/0d9a6ed2ee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3680/1184/files/punepugajetatiguj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/wudikozazunam.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/windows_7_ultimate_retail_key.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/sopepidaned.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/17399730981.pdf
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/58352438299.pdf
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/rifazoferexoge.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/rachmaninoff_piano_concerto_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0430/9958/6714/files/business_vocabulary_in_use_advanced_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/access_icloud_drive_ipad.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000678c.bin
9b85ce0abdc11538ca064c44d3ef0cb4d6582707f04df2faf8e707ea738dcb56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678C 4940 bytes
font_01_sfnt_off0000784c.bin
05aeac9f98ab8f107dc4ecf44800be2ab23a7c574d0997e3dacf1267a5ac41e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784C 6856 bytes
font_02_sfnt_off00008fab.bin
99587caa274fef18751bd1873690ceef63319261e4f5dc80359f3f89be7348e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAB 10460 bytes
font_03_sfnt_off0000b31f.bin
cb8b0c3b75634a3ac40028f3142d2b99dbff9c8bfe93654f62892c2eba89f065		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB31F 16336 bytes

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