Malicious PDF — malware analysis report

Static analysis result for SHA-256 118450edeaeefd97…

MALICIOUS

PDF

38.4 KB Created: 2020-09-01 03:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eed688105309b4d54c18bb28f44e1c7 SHA-1: 1f399ad5ce725e3d42260906996fba809056f1de SHA-256: 118450edeaeefd97f5cef99824cfc7ff297448c252516c4db833cfeabb8210f2
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a specific search query, suggesting a phishing or scam attempt. The presence of numerous external PDF links, many pointing to benign Shopify domains, indicates a link farm strategy, likely to obscure the malicious redirector.

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/wix?keyword=bang+bang+song++pagalworld+mp4
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/2488/2583/files/non_locomotor_skills_worksheet_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0440/5005/5318/files/dupeweditit.pdf
    • https://cdn.shopify.com/s/files/1/0430/6803/1143/files/instagram_dark_mode_apk_ios.pdf
    • https://static.usrfiles.com/ugd/82e28d_db1d9222d5c64550acde37d7481900c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7be3290c59e42d39fbaece658f1d0a6.pdf
    • https://static.usrfiles.com/ugd/b48b60_47e928b6e04a481d87c49a1b9e8a565f.pdf
    • https://static.usrfiles.com/ugd/e643da_4d6ac693c0c64388a2d9ed92f2f2a6fa.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_95ff4b31d78b43c2a5af85437b686c75.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c3da6c33e784c88ad0a16bf27aa3bd2.pdf
    • https://static.usrfiles.com/ugd/99a8f2_8f9624c7cc204de0bac262d7de0e74ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0183fa233b04eaba1a5c57c03c6be3f.pdf
    • https://static.usrfiles.com/ugd/32acb1_eb76181a3ca94220bfb5ecdb0bd729e1.pdf
    • https://static.usrfiles.com/ugd/ed64d2_4b3b41cabe4d40429cf36a693ff9600c.pdf
    • https://static.usrfiles.com/ugd/d162e3_b4262d4b4fcd4b88973dd86958506d0d.pdf
    • https://static.usrfiles.com/ugd/735424_6acdab52687f458686d5e5737aeae7d8.pdf
    • https://static.usrfiles.com/ugd/270e53_6f5d8059134145bea82e85bb8ed9912c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5cb405eec374da292893a431cdc0498.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ba0.bin
41aac1a00ed178814c446538abfa69ce186f7f71c64517645970fdef829866a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA0 5192 bytes
font_01_sfnt_off00005d2a.bin
ce370746f6ebb7562d1ed6174be4c1659910e5f962e66d32c250e3a4b3cff51e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2A 9724 bytes
font_02_sfnt_off00007e86.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E86 4324 bytes

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