Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f370c376e8a0038…

MALICIOUS

PDF

40.7 KB Created: 2020-09-03 18:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d2c41c6f8399f4dd917d6369a42a702 SHA-1: f06eff563d4421991836fd9a0a97cca426313037 SHA-256: 0f370c376e8a0038ed6af6c109ed0f9454389cb78e010d299d6d67a301fbadb2
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for free worksheets. The ML classifier strongly indicates maliciousness, and the PDF is flagged for linking to known malicious infrastructure. The embedded URLs, including the primary malicious one, suggest a phishing or scam attempt.

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.club/wix?keyword=free+printable+personal+space+worksheets
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5025/5014/files/85324133390.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/22751193666.pdf
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/xatuxebamosovuwipiporiwup.pdf
    • https://cdn.shopify.com/s/files/1/0433/4927/8875/files/adobe_illustrator_restaurant_menu_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/1801/7175/files/silexuxatoxisam.pdf
    • https://static.usrfiles.com/ugd/b80405_b18db9bd18094b74b604132da287c064.pdf
    • https://static.usrfiles.com/ugd/d01287_73424d82079b49afa6e4cb5c96e078ce.pdf
    • https://static.usrfiles.com/ugd/145364_4a7e17de61984355875d2d0d32841707.pdf
    • https://static.usrfiles.com/ugd/289c5e_8854b14aa60f4ab99c030f81b9746bb1.pdf
    • https://static.usrfiles.com/ugd/e3325f_f38b946facb5451f92ee62d2c520865d.pdf
    • https://cdn.shopify.com/s/files/1/0454/3076/7784/files/bairavaa_video_songs_free_starmusiq.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/autodesk_2013_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0435/0279/6964/files/american_revolution_battles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8073/files/tilofawuxisixaxekopifax.pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9613/files/fenudeloxurizujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2835/6000/files/airway_obstruction_management.pdf
    • https://cdn.shopify.com/s/files/1/0435/3101/0199/files/pevaleje.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_off00005e7b.bin
2777b2c22c4901ad67d8bd01acba4f04ed68378769aab8a7c0537cb29467f0bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7B 5272 bytes
font_01_sfnt_off00007070.bin
a2d80ee8cb22ae3cd5694c622b81d4809b5643dda00329361aaf324c9326f70b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7070 10764 bytes

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