Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e11e4f5648f4a65…

MALICIOUS

PDF

68.8 KB Created: 2020-08-19 22:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec8d5449cbccf66d62faf3f3516d54a2 SHA-1: eb6eb02038aa40f4bc4f59ba1c2cc72f3a9e1bbe SHA-256: 6e11e4f5648f4a6587854a73e581467337bfb92ff25b8f036e588d592af42720
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The ML classifier also strongly indicated maliciousness. The primary IOC is the redirector URL, which is likely used to funnel victims to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/pify?keyword=d%2526+d+druid+character+sheet
    • http://levaf.definitivearts.net/uploads/1/3/2/6/132680981/fezujijuziwaxuz-jidajepisarira-fawij-xowitamenako.pdf
    • http://files.tidetoadream.com/uploads/1/3/1/6/131637553/botil_xugafez_jidebi.pdf
    • http://files.idahonordic.com/uploads/1/3/0/7/130776712/c6362f3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/avril_lavigne_skater_boy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/pozis.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/acnl_hair_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/94684526100.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/ampicilina_injetavel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/vofuwosukolumawasuguwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4708/2389/files/nevusafixados.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/punctuation_rules_uk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32808714247.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdf
    • https://cdn.shopify.com/s/files/1/0446/7389/2515/files/advantages_of_geothermal_energy.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b44.bin
dea69edc3617924ddd2ea7a2dad42168437cc0f9b5f05654bc8089d7be019e3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B44 6596 bytes
font_01_sfnt_off00007b88.bin
b72324bf9fb2f960ad531a0c7fe13c100795e1c8b461db9e4f4d6c8496002b7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B88 3148 bytes
font_02_sfnt_off000086c7.bin
aee99b222cd6436686fc1950c70eddb31f3190a8e42336a2f9d4910ea93cda3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86C7 4156 bytes
font_03_sfnt_off000094b2.bin
9f47aa96527d7b55db2a44687777893b4fcb5954852002f82c140ab43f2d3994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B2 6224 bytes
font_04_sfnt_off0000a3d9.bin
7b213cbf4b44e8c79d943aeba00e448faf4c1d3a595747e81720774f170b94d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D9 20864 bytes
font_05_sfnt_off0000e01c.bin
8f84ecd7f75584380f617f581aa08df766b27c320f4bc8b0aab0b4efe21da0ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 16304 bytes
font_06_sfnt_off0000f5de.bin
ba170bb474b40190d9812ea6fa89a7109fc11a1f35ae9fc602080c752cac96c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DE 6096 bytes

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