Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a39b5e4d6f5afbb…

MALICIOUS

PDF

66.3 KB Created: 2020-09-18 04:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a940ef890c38861926a8b30530861bd SHA-1: 6956e968587cb2fdedfbc58f49679eb68c7fe275 SHA-256: 5a39b5e4d6f5afbbf4c4959aee1edb00be981f61c319d10df30c83cc68d30fc1
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 to host malicious content. The primary redirector URL is 'https://ttraff.link/wix?keyword=d%2526d+waterdeep+wards', which is designed to lure users to malicious sites. The document also leverages a link farm technique, embedding numerous URLs that appear to be legitimate PDFs hosted on Shopify, but ultimately lead to potentially harmful destinations.

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.link/wix?keyword=d%2526d+waterdeep+wards
    • http://jeruviwa.hairndipitysalon.com/uploads/1/3/1/4/131483281/2368272.pdf
    • http://files.evergreenchristianhs.org/uploads/1/3/0/7/130738714/6821257.pdf
    • http://bukora.lwaracing.com/uploads/1/3/2/7/132740623/negaviwo.pdf
    • http://ligitusaj.etcogiclr.org/uploads/1/3/0/7/130775997/bepikox-divapesusivag-fakewonolavakot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/9816/7709/files/21841470692.pdf
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/answer_android_phone_calls_on_pc.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/codex_adeptus_mechanicus_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/film_alif_lam_mim_full.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7837/files/62399380262.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4166/files/wuniziruwak.pdf
    • https://cdn.shopify.com/s/files/1/0461/1332/5219/files/94029753392.pdf
    • https://cdn.shopify.com/s/files/1/0428/6752/3743/files/vobisibo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/dax_brsen_news_performance.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_off0000b2df.bin
865832ca46ee1aac596e2af09c34c3d6059d9ba0f9f4eea226865a594599e1c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DF 3484 bytes
font_01_sfnt_off0000be4c.bin
2aad08d6207da09209323c54c2c25f7f1694c5ef18862cbe220b9662a4440296		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4C 16060 bytes
font_02_sfnt_off0000eee2.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE2 4324 bytes

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