Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c403f7bab7807f9…

MALICIOUS

PDF

45.3 KB Created: 2020-10-25 10:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87166d16de783442452d368f25d1af3e SHA-1: 13a995cfaab774a98e6cbfcdf0759824a8c02d4d SHA-256: 9c403f7bab7807f96a601672e7f63b6dae39e68e9b7df1453bfcadedce74a059
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to redirector infrastructure and a link farm hosted on weebly.com. The primary malicious URL, https://ggtraff.ru/123?keyword=ph%25E1%25BA%25A7n+m%25E1%25BB%2581m+test+m%25C3%25A0n+h%25C3%25ACnh+android, is flagged as a known malicious redirector. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or to download further malware.

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://ggtraff.ru/123?keyword=ph%25E1%25BA%25A7n+m%25E1%25BB%2581m+test+m%25C3%25A0n+h%25C3%25ACnh+android
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/2920097.pdf
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/d3050db7e.pdf
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/8e0ccfbad9.pdf
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/d76b6fb3.pdf
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/punitetiva.pdf
    • https://vemetufubejukat.weebly.com/uploads/1/3/4/3/134367776/rilulasomel_jozudorikonunu.pdf
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/5058122.pdf
    • https://vatalinonabalix.weebly.com/uploads/1/3/4/2/134234662/rodubosazopof.pdf
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/pijunez.pdf
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5f948ba4af34d.pdf
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5f8cfda87d289.pdf
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f8b7aa1b22d1.pdf
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f8c4e9ebb140.pdf
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f8ed360baeef.pdf
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8e20f8bf2fc.pdf
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f9283df6f8fb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0505/4572/1509/files/fighting_tiger_2_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0481/5916/2521/files/48436348296.pdf
    • https://cdn.shopify.com/s/files/1/0496/0990/0183/files/space_is_key_2_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/vekidaroda.pdf
    • https://cdn.shopify.com/s/files/1/0481/3884/6371/files/aune_b1_user_manual.pdf
    • https://s3.amazonaws.com/wibadinavosunom/xobikawoxoregagevibovad.pdf
    • https://s3.amazonaws.com/sedimeraxufi/1926370050.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_off00006621.bin
f2c2f031ee8ed2d9733b385f577007f9f809b14e44f8d333fb868cd3989ca7ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6621 5752 bytes
font_01_sfnt_off00007803.bin
34236fa7df7711b2a68b3100e4c1fc3151fb73dc8ef67fced2a18699a9ad66af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7803 21212 bytes

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