Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2a9a16560e142e…

MALICIOUS

PDF

44.8 KB Created: 2020-08-04 14:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d096e873569bd2b20f06e322b501d198 SHA-1: ded161a104719d42f9c80fde6822b7fccbbc601e SHA-256: 6b2a9a16560e142ee9039bc217e5ac023de277a155db7a36fa0141ddd8735efe
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly indicates maliciousness. The presence of a 'download button' heuristic suggests a social engineering lure to trick the user into clicking the malicious link, likely to download a secondary payload.

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.ru/pify?keyword=free+online+pdf+to+word+converter+editable+text
    • http://files.gaoruideus.com/uploads/1/3/1/6/131637307/fituxolu.pdf
    • http://files.leopoldwritingprogram.org/uploads/1/3/2/7/132712614/3ea99.pdf
    • http://files.thomasstonewrestlingclub.org/uploads/1/3/2/6/132682051/3605317.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9689/8724/files/zivegukas.pdf
    • https://cdn.shopify.com/s/files/1/0435/8635/5357/files/index_of_canais.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/76720707300.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7206/files/41072877176.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/25461837696.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/nolobol.pdf
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/patadilijogigepadilame.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/canon_rebel_xl_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4739/4199/files/how_to_rip_3ds_games.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/convert_mkv_to_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/xuwezidetibobubuwipesaj.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_off00007052.bin
679edff15f467f9414005f6fb026b94e78235fef88c6069a219bb868da08988b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7052 5284 bytes
font_01_sfnt_off00008273.bin
eef0267bfca93cfe9c95e3d5d2b3113a97cfadd99fa18b3805ea78dc71bdca17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8273 10420 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.