Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f79059ba3064cc1…

MALICIOUS

PDF

56.8 KB Created: 2020-10-28 11:19:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 087da3f0d09caa94481f9553ea9e6f10 SHA-1: 1209eb4773b1a4f74645af924cf230dd8ef1f2ea SHA-256: 9f79059ba3064cc156eaa4b79b54f428f7bb48568a6a4b31721487493eb08d86
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to a known malicious infrastructure. The document body, though partially corrupted, contains the same topic as the malicious URL, suggesting a lure. The presence of numerous external PDF links indicates an attempt to manipulate search engine results or distribute further malicious content.

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.cc/123?keyword=meaning+of+food+guide+pyramid+in+hindi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_5f96d0591f55e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f8c0099be25e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8a82d125a56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5f931a90a383d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5f967aa337511.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/5515325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f8f67259ddf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f969728245f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5f90a799c2fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f8d469ec770c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/podiresibozotadubozaduzel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/download_webtoon_apk_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/download_struckd_3d_game_creator_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3799/3371/files/rc_fouad_whatsapp_mod_ios_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7084/3797/files/16244599426.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/cardiovascular_system_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/sokukima.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/wumuvowagefowufotegusodos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1868/8956/files/xbox_assist_0x87dd0006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0030/6111/files/ink_master_angels_episode_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5287/5424/files/osrs_99_fishing_guide_f2p.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6522/7432/files/cutoff_frequency_of_rectangular_waveguide_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8435/8843/files/wavojusumusoxisilunob.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B74 5352 bytes
SHA-256: 185c0dd1498cec1ee4489800f98d8b23f81b5a9d6854254c48ef7de1bcb54f95
font_01_sfnt_off0000ad8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8E 12540 bytes
SHA-256: 7a7db6050390a21d44c0253f6eee895aa1385e077eade505f66ccf1f93725360

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