Malicious PDF — malware analysis report

Static analysis result for SHA-256 182298b51719a4e7…

MALICIOUS

PDF

38.6 KB Created: 2020-08-30 15:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad547eb32938beaddbd8623f5edccb0c SHA-1: 436d4fb64d4a4f82d13246deb5d53ac401946931 SHA-256: 182298b51719a4e7a75d2413d228a4e46661ab8814c3c124d1657bed47a0c0a4
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one prominent link identified as a malicious redirector. The document body, though partially obfuscated, includes text that appears to be a lure for a game, combined with a call-to-action phrase. The presence of a malicious redirector suggests an attempt to deliver a secondary payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=creepy+nights+at+freddy%2527+s
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d01287_1ed3486da7ce49a6af961dcaf775b58d.pdf
    • https://static.usrfiles.com/ugd/93c935_3b65f6d3e9174fb68d01023ed931631c.pdf
    • https://static.usrfiles.com/ugd/5bb01c_5975e8a292ed437fafc6484cd5dcf53d.pdf
    • https://static.usrfiles.com/ugd/e3325f_2cd344c0f6514b6895b42f70c7ea4743.pdf
    • https://static.usrfiles.com/ugd/b8c837_52b1f7723aae4e51b8b7a0f5db87dec4.pdf
    • https://static.usrfiles.com/ugd/f459ea_b3e953552b7b4b6b9564410c6fcf3340.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_450e8edab4f248e3b93c03538461acff.pdf
    • https://static.usrfiles.com/ugd/eda9ba_f85fbc1ad2cd485eb221bfe617a76e59.pdf
    • https://static.usrfiles.com/ugd/db1da1_0b109171bd0041edac3a025fd49efebd.pdf
    • https://static.usrfiles.com/ugd/565485_48008b76cfb849e0a0ae2d11bd003c99.pdf
    • https://static.usrfiles.com/ugd/74a852_e755c47be9124d1d945efed6544dd5fb.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/74518452238.pdf
    • https://cdn.shopify.com/s/files/1/0461/7489/6281/files/camscanner_apk_for_android_4._1.pdf
    • https://cdn.shopify.com/s/files/1/0450/3722/4094/files/adding_vectors_graphically_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/free_ccna_labs.pdf
    • https://cdn.shopify.com/s/files/1/0462/6051/9066/files/tabijogukixubomawas.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_off00005763.bin
2866677b9c76bdad5a5ac0189ccb487f42a7c5b4dc9b49cfddd2ae3faf703b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5763 5312 bytes
font_01_sfnt_off00006975.bin
67b3758889ead0b2cf8f76478d0d97353faab3b99ff4817ad6db00f732a206b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6975 10676 bytes

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