Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f05326ca1ce2d05…

MALICIOUS

PDF

58.0 KB Created: 2020-08-05 10:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c9f76a03ba72a7ffd041761ce9afef5 SHA-1: 0d966d58258d22d74a6257b4d639679099bab44e SHA-256: 0f05326ca1ce2d05f48aa72df2e6800b49bbe6bc67879e4329dcf176280e9e31
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results, with the primary link leading to a known malicious redirector. The document body itself is heavily obfuscated but contains the URL that is also flagged by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This suggests the document's primary purpose is to redirect users to malicious infrastructure.

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/pify?keyword=descargar+libros+de+gustavo+adolfo+becquer+pdf
    • http://files.gethealthyknox.com/uploads/1/3/2/6/132696214/6819ea1.pdf
    • http://files.thegreatlife.com.au/uploads/1/3/2/3/132303010/ed7414f14e6d641.pdf
    • http://files.cedartboats.com/uploads/1/3/1/4/131438036/3849681.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/zeroxufuba.pdf
    • https://cdn.shopify.com/s/files/1/0437/2532/4439/files/john_deer_leaf_blower.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/zekamakufurabigosar.pdf
    • https://cdn.shopify.com/s/files/1/0428/4012/9692/files/minecraft_mortal_kombat_skin.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/sasevilalunojezeli.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5547/files/donutedagujefudef.pdf
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/disadvantages_of_computer_network.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39806276645.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/types_of_neural_tube_defects.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/21460304466.pdf
    • https://cdn.shopify.com/s/files/1/0437/1932/7896/files/rizixerefexaribi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/medosep.pdf
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/dojepagobogupu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/wilderness_survival_quiz.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_off0000a06c.bin
7d931fa5a922bb663816800c24484b7accbbeb36209f2c7c027910b4617f3774		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA06C 5648 bytes
font_01_sfnt_off0000b3b2.bin
d4c4cd4ddd97dd6933c9c90d61ee5b7c07eef0c7c2ce03d3f6f28286c9d88540		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B2 11364 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.