Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e263a50f6541ab…

MALICIOUS

PDF

36.7 KB Created: 2020-08-02 11:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cf9e0fc242e82f28dd3ff83a2752e95 SHA-1: d2cf702567dc56e94144656f9d417a295b5eb04e SHA-256: d9e263a50f6541abf46cede6028ded7e7b07963d353dc2f96d4df60b6fd3f8a4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a keyword related to 'Diablo 3 private server'. The document also hosts a large number of external PDF links, many pointing to shopify.com, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.ru/pify?keyword=diablo+3+private+server
    • http://files.lovebirdsvintagedecorrentalsofpa.com/uploads/1/3/0/7/130740504/wifomowogitilut-vuvakiju-tuwib-wosofetegulivu.pdf
    • http://files.septicserviceshunstville.com/uploads/1/3/0/8/130814129/5908432.pdf
    • http://files.laceywestmusic.com/uploads/1/3/2/6/132680813/jovasuvaban.pdf
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/64344634612.pdf
    • https://cdn.shopify.com/s/files/1/0430/6613/0593/files/15905341663.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/pufevera.pdf
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/20863360205.pdf
    • https://cdn.shopify.com/s/files/1/0440/9737/2312/files/21245756956.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/nigivividug.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/vokobem.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/rukanotifisawadezutixopoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/golf_biomechanics_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/burglars_pack_dnd.pdf
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/nobopefowigemazizafak.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8708/files/43527873587.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/gotokiwevemalakuvek.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045e6.bin
b778cae82e924c6d2d6854e71ab0e1121bc53383cf1db320b6ae38008e7bd8aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45E6 4856 bytes
font_01_sfnt_off00005674.bin
d77d613b4519d1cde4d9db247b755dba1b9d83e4e4410d52d748c6ba36a6ed78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5674 9852 bytes
font_02_sfnt_off000077cc.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CC 4324 bytes

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