Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e50931014c99bd…

MALICIOUS

PDF

43.6 KB Created: 2020-08-23 13:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cb52c252715f065571e4067fa8c490c SHA-1: 43e8071e6d47957a93d5b859aa0354fdd7a50413 SHA-256: 44e50931014c99bdf4f4fdb83a39cc0627344c32c07e93ba74978d7f66d050fc
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The primary malicious URL identified is https://ttraff.cc/pify?keyword=pdf+burdah+sekumpul, which likely serves as a gateway to further malicious content. The document body is heavily obfuscated and contains embedded URLs, further supporting the malicious intent.

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=pdf+burdah+sekumpul
    • http://files.nhaohpad.org/uploads/1/3/0/9/130969097/loruv_jotaxovepusut_zipora_zinog.pdf
    • http://files.kesslerkarateacademy.com/uploads/1/3/2/3/132303351/nofiko.pdf
    • http://files.davidemariano.com/uploads/1/3/0/7/130740524/nafazatisuxes_fulekabew.pdf
    • http://files.paintcoveredkids.com/uploads/1/3/0/9/130969603/723011.pdf
    • http://files.barngoddesspahrump.store/uploads/1/3/2/6/132681342/4045466.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/24332361374.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/lekejefefawusaluz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/baixar_leitor_para_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/toraxoraf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/rassembler_fichier_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/xesegelojodo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2797/0718/files/vancouver_wa_weather_15_day.pdf
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/fusononebanogepuninenuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0512/files/minecraft_mob_spawn_distance.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/fajunomavakezefisomu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ee.bin
94730920b9566a15bf3a1af1c83c85c79d0af9fea6053c0bda5c1562f64b61df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EE 5484 bytes
font_01_sfnt_off00007571.bin
ccd272594ac6205122c808d06bfe28436b4bd30604a468c665a6b5219be84f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7571 14328 bytes

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