Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1b962789988c3c…

MALICIOUS

PDF

111.7 KB Created: 2020-08-16 19:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abcba95d77face0e098eb391e0d6adc1 SHA-1: eb3dab30b636b4e501f9dd6b3583525c0916718e SHA-256: 6f1b962789988c3ce33888b2fdaf655230178d3254803b7e5bfb39ce168f4d7a
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt. The ML classifier strongly suggests maliciousness. The document body, though heavily obfuscated, contains the redirector URL, suggesting the primary purpose is to drive traffic to malicious infrastructure.

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=nuclear+energy+fission+and+fusion+worksheet
    • http://files.satelliteaerialsystems.co.uk/uploads/1/3/0/8/130873822/e60c40572a752f3.pdf
    • http://files.fisheye.lt/uploads/1/3/0/7/130775725/dizamanadotege.pdf
    • http://bejixuzim.authorizedealers.com/uploads/1/3/2/7/132741144/5621019.pdf
    • http://tuxip.bradfordrose1638.com/uploads/1/3/1/4/131406744/munoxelunoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/cognitive_biases_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9434/files/gungeon_ring_of_mimic_friendship.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/metugokak.pdf
    • https://cdn.shopify.com/s/files/1/0437/3381/1351/files/tikudogazetozatoxoxini.pdf
    • https://cdn.shopify.com/s/files/1/0436/4976/1433/files/abstract_art_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/91619720573.pdf
    • https://cdn.shopify.com/s/files/1/0449/4213/1355/files/panda_mp3_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/rexufepelaxivaganibusefir.pdf
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/genatijupibipefuzameg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41557636134.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016208.bin
71a896201445330048ed9e24b1438e98bb5c204fc29f4ce988e8e8bcbe97ce3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16208 5512 bytes
font_01_sfnt_off000174e0.bin
65028e145d87cdd0d324169f84f29e0ab3de51e5d25080b2d810b2efcba019da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x174E0 11404 bytes
font_02_sfnt_off00019bca.bin
3baadc76a16b987571be49b509ec30c91c3168181e676f4f3db14aa15da7d62d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BCA 16348 bytes

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