Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fee274bf7065c11…

MALICIOUS

PDF

37.6 KB Created: 2020-08-25 13:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 201ef4eb0f422d6d3f42bfa3937423f1 SHA-1: 9c26dbf35bef54a6c4714c41092368bb33efd2ea SHA-256: 0fee274bf7065c11e15afdba691fe4ee905ab4935f4ba428c08690ef371985ec
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body text, though heavily obfuscated, appears to contain keywords related to 'Minecraft pe cape creator apk', suggesting a lure for users interested in such content. The presence of numerous external links, many pointing to Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the ultimate destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=minecraft+pe+cape+creator+apk
    • http://files.brendaniman.com/uploads/1/3/0/7/130775707/8081515.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7386/3829/files/4150790531.pdf
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/recent_apps_screen_android_pie.pdf
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/59184238984.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/74040440296.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/o_behna_pyari_behna_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9725/files/zimanulozupejugofibebufav.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/83043533384.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/ways_to_improve_listening_skills.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0411/files/makozolezukat.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_off00004251.bin
61cd07942ea2c7aac208fec0fe814114d5440d0ad7f5245b4feea53882651093
pdf-font-stream PDF embedded font (sfnt) at offset 0x4251 4868 bytes
font_01_sfnt_off000052f2.bin
6f00a1f5d88f29a384164b22b3080480c21f2aa1e2295afced687287a1544c45
pdf-font-stream PDF embedded font (sfnt) at offset 0x52F2 9896 bytes
font_02_sfnt_off00007515.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
pdf-font-stream PDF embedded font (sfnt) at offset 0x7515 16092 bytes