Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04531e69cbf5f57…

MALICIOUS

PDF

37.4 KB Created: 2020-10-25 05:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5980fd36e7213e9131d3d0b408d9b397 SHA-1: 227c20326fbebc06cd5d31b32ac42d69738b769d SHA-256: d04531e69cbf5f5766ae22cb78fc1177e85e4984e06e269b2c8516b923c45c32
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting a link farm or SEO spam campaign designed to redirect users to malicious sites.

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.club/pify?keyword=bhartiya+itihas+kiran+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5f8b2db2c1162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5f8e505719147.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/nafinemapaxaxiv.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/xuwur_namamumax_misisemenanu.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/6ea6ef826f56.pdfIn PDF document text
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/5207902.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/1/0502/0667/1026/files/product_design_and_development_ulrich_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/mapefaxotudarene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7254/0838/files/shades_of_afrika_owner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9140/2146/files/44365508200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4960/2209/files/jopoxiwinovemijarofanowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6189/9171/files/surprise_me_sophie_kinsella_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/difference_android_and_cyborg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8868/2401/files/jizubinek.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/libro_balistica_forense.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/types_of_genetic_polymorphism.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/information_classification_standard.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_off000053f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53F8 5312 bytes
SHA-256: 317881d3be4f485af4bb5c3e751838fa8cffc2ae252dbe5dfb299035285c6dbd
font_01_sfnt_off0000660f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660F 10164 bytes
SHA-256: 8dfa8168bd57321430e8ce8b8120a239be8b88e42c8b0054733e72d31978a4a5

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