Malicious PDF — malware analysis report

Static analysis result for SHA-256 9823f55d01244b04…

MALICIOUS

PDF

39.7 KB Created: 2020-08-28 01:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 092d872ffc1a3b05fab895bf0154237f SHA-1: fc604e325fc0da269f9293028d2eb9409e51d2eb SHA-256: 9823f55d01244b04129b4268dfe40e6d2efffda83616c305cea0231a65f4c93e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a deceptive title 'Kill myself game' and embeds a large number of links, with at least one pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed to link to malicious infrastructure and engage in SEO link farming. The embedded links likely serve to either phish users or direct them to malware download 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.cc/pify?keyword=kill+myself+game
    • http://files.eastbayayurveda.com/uploads/1/3/0/8/130814935/8a5c4491.pdf
    • http://files.marshallconservatory.com/uploads/1/3/1/3/131381109/b08d4a9718cd472.pdf
    • http://files.peachandpippin.com/uploads/1/3/1/8/131856270/ad448452920a172.pdf
    • http://fatuz.christiangreenlmt.com/uploads/1/3/2/6/132680981/5244080.pdf
    • http://rarujinaf.objectpages.com/uploads/1/3/1/4/131453872/jogadug_falerun_visimuleve_fibawesazu.pdf
    • https://cdn.shopify.com/s/files/1/0448/8026/5383/files/ocean_animals_coloring_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/blumenfeld_clinical_neuroanatomy.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/xufupebimorikudupewen.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4649/files/direct_tv_rebate_forms.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/35126514268.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/email_verifier_pro.pdf
    • https://cdn.shopify.com/s/files/1/0438/3562/1526/files/85720394376.pdf
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/geneva_mechanism_mini_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/859780488.pdf
    • https://cdn.shopify.com/s/files/1/0433/4249/5899/files/basic_complex_analysis_marsden.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005221.bin
2fda9de8f94843917a2c4eba6e227e34871124d102b7ca3f24a5b0aabc5373b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5221 4556 bytes
font_01_sfnt_off000061a1.bin
202a25502a147a3872269894332afb16ed658045e55fdd21ee82ae92d4db1b60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A1 10176 bytes
font_02_sfnt_off00008431.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8431 4324 bytes

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